Revealing mistakes: When Jason is on fire in the cornfield and the fire in the cabins at the end you can see the actor's safety goggles behind the Hockey mask
Continuity: In the cabin when Jason attacks Kia, Will, Lori, and Charlie, a shelf bracket disappears and reappears on the wall between shots, sometimes covered with blood.
Continuity: The position of the girl's shirt after she flashes the camera and before she jumps into the lake.
Revealing mistakes: After Lori lights the dock on fire and dives into the lake, before the huge explosion you can see there are drops of water already on the camera lens.
Continuity: When Lori asks Blake to go get them some beers, Kia looks at them and smiles. But in the next shot she has her hand at her mouth, holding a chip.
Continuity: When Gibb goes to take a shower, Trey pulls the covers up to his chin. In the next shot when he reaches for a beer, the covers are down.
Revealing mistakes: In the shot of Jason stabbing Trey while he is shaking his beer can, you can clearly see that Jason is stabbing downwards into the mattress and is not even close to Trey.
Revealing mistakes: When Jason is about to kill Blake, you can clearly see that he stops swinging the machete before he makes contact with him.
Continuity: As Kia is flipping through the magazine in the nurse's office, the direction she is turning the pages changes as the shot changes.
Revealing mistakes: When Freddy does the "Got your nose!" bit to Kia, you can see at the bottom of the screen where they cut off Freddy's glove in the computer when placing it in for the final shot (full frame only).
Revealing mistakes: When Freddy is about to kill Gibb, the claw near the top right that is in the locker bends like rubber.
Continuity: When Shack is talking to his teammate about the Everclear, you can see several people dancing at the rave in the background. But when Jason starts chasing him, they appear to be very far away in the cornfield.
Continuity: After Shack throws the alcohol onto Jason, it is a quick cut and all of a sudden he has the torch in his hand without even reaching for it.
Continuity: When Shack is running away from Jason, the overhead shot shows that Jason has almost reached him, but when Shack emerges from the cornfield, Jason is quite a few paces behind him.
Revealing mistakes: When Jason is on fire during the rave scene, it is rather distracting to see the stuntman fully padded with flame resistant clothing.
Revealing mistakes: As Shack is running towards the camera in slow-motion, you can tell that he is holding a mouthful of blood, ready to spit it when he is hit by the machete. When he does spit blood, it splatters onto the camera in the lower right-hand corner.
Revealing mistakes: Jason was on fire for a considerable amount of time, and yet when he is put out by the beer, his clothes appear to be undamaged and fully intact.
Continuity: Jason was completely covered with white beer foam, but in the next shot he has no foam and his clothes appear relatively dry.
Revealing mistakes: In the rave scene, when Jason slices through several of the ravers, their chest appliances that squirt blood are noticeably bulky under their shirts.
Continuity: Brown smears appear on Mark's face before he is killed.
Revealing mistakes: When Lori is sleeping on Freeburg's couch and Freddy grabs her, the pinkie claw furthest from her bends like rubber.
Revealing mistakes: Right before Stubbs's body is thrown through the door at the asylum, you can see where the door has been cracked beforehand in the lower left-hand side where the glass meets the wood.
Plot holes: Sheriff Williams has 24-hour roadblocks set up around Springwood, but the teens seem to run into no problems when they leave for Crystal Lake.
Revealing mistakes: When Freddy's arm gets sliced off by Jason in the dream fight, you can see the lump behind his back where the actor's arm is pulled back under the sweater.
Revealing mistakes: Jason clearly makes contact with Freddy just above his forearm, but yet his arm is somehow sliced off at the shoulder.
Continuity: When Freddy stands up before he regenerates his arms, what happened to all the blood and gunk on his sweater from his sliced limbs?
Plot holes: When Jason gets impaled in the dream sequence with his own machete, there doesn't appear to be a hole in his chest in the real world.
Plot holes: After the van crash, Kia sees a sign that says "Crystal Lake Developments", but then they all walk in the opposite direction of it.
Revealing mistakes: When Linderman dashes at Jason and impales him with an American flag, Will is dragging Lori (who is supposed to be unconscious). He's dragging Lori by her arms. But when he suddenly reaches behind his back with his right arm, her right arm stays up in the air.
Revealing mistakes: Lori's hand that drops into the flames is clearly protected by a rubber sleeve and glove.
Continuity: When Jason throws Freddy against the wall, you can see that there is a large space between the window of the cabin and the end of the wall on the right. In the next shot where Jason starts to put Freddy through the window, you can clearly see that there is hardly any space between the window and the end of the wall.
Revealing mistakes: When Jason is running Freddy through the windows of the cabin, a light-colored protective flap can be seen poking out from the right side of Jason's mask.
Revealing mistakes: Jason sends Freddy flying slightly forward through the air with a punch, but in the next shot he is shown falling backwards onto the propane tanks.
Continuity: Jason is skewered on the spikes of re-bar, and yet when he is hit several times from behind with the swinging vat, the ones coming out of his chest bend all over the place. In later shots, they are shown to be quite solid and sticking out straight.
Continuity: When Freddy is swinging upside down from the vat, his hat appears to have fallen off, but in the next shot his hat is still on, only to be knocked off again.
Continuity: When Freddy and Jason get hit by the cart, they go flying through the air and land right next to each other on the dock. In the next shot, Jason is shown getting up quite a distance away from Freddy.
Revealing mistakes: Several times during the movie Freddy's sweater lifts up to reveal either normal, unburnt skin, or a tight black undershirt. For example, when Freddy is hanging upside down from the large construction vat.
Revealing mistakes: Freddy's head is obviously a dummy in the climax.
Crew or equipment visible: When Lori wakes up in the police station and follows the dropping blood, she turns a corner because she hears a little crying. Right after she turns the corner, the cameras show office windows. You can see someone sitting down and a camera on his knees.
Revealing mistakes: Obvious stunt double when Jason throws Linderman against the wall.
Revealing mistakes: After Jason has killed Stubbs, we see all the kids in the room looking for Hypnocil. Then we see Stubbs being 'thrown' through the door. However, we can see the stunt double come running before going through the door. So he isn't actually thrown.
Crew or equipment visible: When the kid wakes up and his father is sitting beside him with his neck chopped on the porch of his house, the kid hears a noise in the bushes. As he walks towards them, we get a shot of the bushes moving - to the right of the bushes, the shadow of someone shaking them is visible.
Continuity: When Jason throws Linderman to the wall he gets impaled by a sharp object stuck to the wall. However, as Linderman is flying against the wall before hitting it the object isn't there.
Revealing mistakes: In the scene were Freddy and Jason are fighting at the end, when Freddy puts the machete in Jason you can easily see a rip in the shirt made for the machete to go in.
Continuity: When the girls are at Lori's, just after Kia asks them if they think she needs a nose job, the lights flicker. When they flicker Kia is holding a compact in her left hand and she begins to close it. Both hands are up by her face but then the angle changes to a wider shot and her left hand is empty and on her lap and the compact is in her right hand as she places it on the sofa.
Revealing mistakes: In the dream fight between Freddy and Jason, you can see the wire that holds the machete up when Freddy catches it after Jason swings it.
Revealing mistakes: When Gibb finds her dead boyfriend in the bed, his eyes dart to his right.
Continuity: In the corn scene, Jason is set on fire, and then takes out his machete and the sheath is still on, but then its gone after the machete is thrown into the air.
Revealing mistakes: When Freddy slices Jason's fingers off, not only does he miss him completely, but you can see the cuts in Jason's fingers where his fingers will fall off.
Plot holes: When they are searching for Hypnocil on the Internet, we see a picture of the Hypnocil bottle reading "Hypnocil, 500mg, 1000 tab". We also see Hypnocil pills lying beside the bottle. Considering the size of the pills, the bottle could never contain 1000 pills. Not even close to 100 pills.
Continuity: When Freeburg and Shack are handing out the flyer's for the party, we see Kia cross her arms as Gibb ask Lori if she wants to go. When it cuts, Kia has her arms down.
Continuity: When Lori, Kia and Gibb meet and they hug each other, we see Kia putting her arm on Gibb's shoulder. When it cuts, Lori's hand is on Gibb's shoulder and Kia's hand is on Gibb's back.
Continuity: When Lori explains she haven't had much sleep lately, Kia says "Lori, you had to sleep at the police station.". If you look at Kia's purse straps you can see some of Kia's dress sticking up between the straps. When it cuts, the piece of her dress no longer sticks up between the straps.
Continuity: When the guards leave after sedating Mark, Will gets up in his bed and we see Will's pillow askew. When it cuts, his pillow is straight.
Continuity: When Kia removes Jason's mask we see Linderman holding on to his knee with his finger out. When it cuts, his fingers are clenched.
Continuity: When Mark tells Kurt he never does checkers, we see Will holding his hand down on the table. When it cuts, he has his hand up by his chin.
Continuity: When Freddy, disguised as Mark's brother, approaches Mark saying he's gonna send them a message, the dirt on Mark's face differs between the shots.
Continuity: When Mark is telling about Freddy to Lori we see her holding her ears, then as Will appear, she takes her hands off her ears and lower her hands. When it cuts back to her she is still holding her ears, then she lower her hands again.
Continuity: At the institution when they find the coma patients, Will picks up some papers from the patient's charts. The way Will holds the papers differs in the shot when Lori says "Who would do this to people?"
Continuity: At school when Lori approaches Will, she puts her hand on his chin. Will then places his hand on Lori's hand and says "I thought you might be in trouble," while their hands still are on his chin. When it cuts, their hands are suddenly down.
Continuity: Before Jason kills Trey, we see Trey getting a can of beer. Beside that beer there is another can, which changes position in the next shot.
Continuity: When the skinny-dipping girl reaches the ladder attached to the pier, you see her grab it with her left hand. When it cuts, she holds on to it with her right hand.
Continuity: When the girl goes skinny-dipping you see her leaving her purse and clothes on the pier. When it cuts, they have suddenly disappeared.
Continuity: When Will and Lori are driving in the van you see a car's headlights behind them in a close-up shot. However, in the previous wide angle shot, there was no car driving behind them.
Revealing mistakes: When the drug "Hypnocil" is researched on the Internet, an article about the drug appears. If you read the article, you can see that it has nothing to do with Hypnocil. The article is about drug testing of students who engage in extracurricular activities.
Continuity: When Will says "Let's tie the bitch up" you see Kia lifting her hand up. When it cuts, her hand is down.
Continuity: In the end of the movie when Jason comes through the water stabbing Freddy with his own glove, you can see the spikes only coming out of Jason's chest. When it cuts to Freddy falling to his knees, the whole fist and parts of his arm-wrist suddenly has gone through his chest.
Continuity: When Freddy's shadow impales Blake, you see Blake running off the street. When it cuts, you see Blake running off the street again in the background.
Revealing mistakes: In the fight scene at the pier, after Freddy and Jason get thrown into the air by the carriage that smacks into them, they land on the pier in sort of slow motion. As Jason lands, you can see a kneepad.
Continuity: When the teens enter the mental institution to get the dream suppressant drug, it shows a security guard drawing his pistol in alert to an intruder banging on a door. The next shot cuts to show the response of two teens hearing a single shot fired, and then cuts back to show the security guard under the door with four big dents from Jason and two bullet holes. The holes are located at the top right hand corner of the door and the other near the door handle.
Continuity: Out at the party when Kia comes to Will and Lori and says, "Let's go shake our ass on the dance floor," you see Linderman standing a few feet away from Will. When it cuts, Linderman is suddenly close to Will handing him a beer.
Continuity: When the sheriff says, "Or so help me God I will lock you up," to Stubbs, you see the sheriff lift his hand with the cigar up. When it cuts his hand is down.
Continuity: When Jason slams his machete in to the panel and gets electrocuted, the panel is pretty damaged. When it cuts to him grabbing onto Stubbs, it shows the panel again, much less damaged.
Continuity: In one scene a security guard gets squashed by a door. It then pans over the door, and you can see large gray marks in the door, from where it's been bashed in by Jason. The dents are quite different from when the camera pans over the door, to the wide shot.
Continuity: When Lori's father is following her up the stairs, she stops beside a painting. In the next shot she is standing further up the stairs, then she is standing beside it again.
Continuity: The end of Jason's machete changes throughout the whole movie. Sometimes it has a rounded end, sometimes it has a pointed end.
Continuity: When the teen tranquilizes Jason and gets cut in half, we see the two parts of the body in the left side of the hallway. After a few scenes, when the camera gets a close-up of the body parts, we see one in the left side of the hallway and the other one in the right side.
Plot holes: Whatever damage Freddy inflicts in the dream world happens in the real world. Freddy clawed Jason's mask in the dream world, but his mask in the real world is never damaged.
Revealing mistakes: In the cabin fight scene while Jason is trying to free his machete from the table, Kia picks up a wrench and starts hitting him. When she hits him across the face, you can see the wrench bend in her hand.
Continuity: When Jason bashes through the cabin wall and slashes the teenager, a crate can be seen on Jason's right foot. The crate alternates being on/off his foot between shots.
Audio/visual unsynchronized: About fifteen minutes into the movie, when Gibb says, "I am so under the limit, Lori," her lips don't match the line.
Continuity: In the boiler room in Jason's "dream", the container that pins Jason to the floor moves between shots.
Continuity: In the opening sequence, when Heather (Skinny-Dipping Girl) runs down the pier, the first overhead lamp sways violently back and forth. However, in the next shot a second later the lamp is dead still.
Continuity: About 25 minutes into the film, when the three girls are sitting outside the school, Gibb puts her cigarette to her lips twice.
Continuity: During the final fight scene, on the dock, between Freddy and Jason, Jason pulls off Freddy's left arm. But when Lori and Will blow up the dock, the bodies of both men that go flying through the air have two arms.
Continuity: One of the ravers killed by Jason is wearing a white fisherman's hat, and he is shown being killed again near the end of the sequence.
Revealing mistakes: When Will and Lori are sitting in the van, the camera shows rain starting to fall in front of the headlights. But when the camera tilts up, there is a noticeable pause before the rain starts coming down on the windshield.
Revealing mistakes: When Jason is flying out of the van, the wire is visible.
Continuity: When Kia is sitting on the couch with Lori and Blake in the beginning of the movie, Blake asks Lori, "So, Lori. Am I going to get that grand tour, or what?" Kia is eating when Lori is telling Blake to get the beers. But in the next shot, when Blake gets off the couch, Kia is smiling at Blake, and then goes back to eating.
Continuity: When Jason and Freddy are at Crystal Lake, Freddy begins to make torpedoes fly at Jason. When he gets hit, he is right in front of the tank, and beside the ramp. But when he looks up at Freddy, he is about two feet away from the ramp.
Continuity: When Jason is being attacked by Freddy on the dock, Jason is facing Freddy in one shot. But in the next shot, he is bending over, and facing away from Freddy. Freddy then hits Jason with the machete on the back of his legs.
Continuity: Towards the end of the movie, Freddy blinds Jason by impaling his eyes with his razor hand. But when Jason's body submerges in the end, his eyes seem fine.
Revealing mistakes: When Freddy is knocked off the ramp at the end of the movie fight scene, his hat flies off as he dangles from the swaying piece of machinery. But a later shot shows him with his hat still on as he dangles, then falling off again as the machinery slams into a wall.
Miscellaneous: During the party in the corn field, the guy who Jason kills second (throwing his machete at whilst it's on fire)is running towards camera. The shot before you see the machete, you can see the actor is running with his mouth closed, holding something in it - the blood he spits out in the next scene.
Revealing mistakes: When Jason sends Kia's body flying into the tree during the fight scene at Crystal Lake, you can see the dummy's arm go flying off of the dummy, in the upward direction, in the shot after the body makes contact with the tree.
Revealing mistakes: In the last fight scene when Freddy turns Jason onto his back and before he stabs him in the eyes you get a glimpse of Freddy's boxers.
Continuity: When Freeburg breaks the cabinet holding the pills there's blood on his hand but in the next shot his hands are clean.