FAQ for
Friday the 13th: The Final Chapter (1984) More at IMDbPro »

In hospitals, double doors like that are on hinged mechanisms that keep both doors open for stretchers to come through.

The twins changed their mind and just said that because they wanted to hang out with the other teenagers.

Either Paul was trying to scare the counselors into staying at the camp in Part 2 or Tommy was mistaken.

The first time they went they were going to a specific place called Crystal Point (supposedly for the rope swing and it being "secluded" from other cabins). When Samantha goes out, she goes to the closest shore.

The bottom of the raft is not inflated, it is simply rubber stretched across, so it does not sink after being punctured.

The workprint features several story extensions that were probably cut due to pacing reasons. Unfortunately, no new gore scenes can be found in this version. Nonetheless a detailed comparison between both versions with pictures can be seen here.