Revealing mistakes: During the fight inside the ice factory when Cheng gets caught, he ducks down a little too obviously before his opponent throws an object at him.
Continuity: During Cheng's final battles wearing the long sleeve shirt, the sleeves start to roll up and down on their own.
Continuity: The knife in the villain's chest disappears after Cheng punches him multiple times on the ground.
Audio/visual unsynchronized: When Chao-an and "The Boss" face off, when "The Boss" pulls out his knives for attack, he slashes Chao-an once across the stomach, and once across the back. However, when slashing at his back, a sound effect implies that he misses, when a scar can be seen on his back seconds later.
Revealing mistakes: When Cheng Chaon slides the ice down the ramp and it crashes, a bar can be seen placed on the ramp to assist the crashing.
Continuity: The bandage on Bruce's left hand changes sizes through out the course of the film.
Revealing mistakes: When the guard dogs leap at Cheng, they are obviously thrown.
Continuity: Despite receiving a deep cut to his left arm the night before, Cheng has no scar on his left arm the next day while fighting "The Boss".