Character mistake: When Trish's car stops running, Tommy states that its the solenoid that is the issue. A starter solenoid is responsible for sending voltage to the starter when the ignition is engaged. 1st problem: The car would not stumble and stall because of a faulty solenoid. 2nd problem: The starter was already engaging while Trish was hitting the key. So bridging the solenoid was pointless. The only reason to bridge a solenoid is to create a connection from 12 volt to the starter when the internal system is compromised due to wear. But that wasn't the case because when she was trying to start it, the starter was turning the engine. Plus the solenoid has nothing to due with the way an engine will perform (running, misfiring, not running).
Friday the 13th: The Final Chapter (1984)
1 character mistake - chronological order
Directed by: Joseph Zito
Starring: Crispin Glover, Corey Feldman, Peter Barton, Erich Anderson, Judie Aronson, Kimberly Beck
Genres: Horror
Revealing mistake: Trish jumps out the window and lands face up on the ground. You can plainly see it's Kimberly Beck's stunt double. She looks nothing like her. (01:21:35)
Jimmy: Hey, Ted, where the hell is the corkscrew?
[Jason appears and shoves the corkscrew into Jimmy's hand]
Trivia: When Judie Aronson, who plays Samantha, was filming the scene in the raft where she gets killed, they were doing so many takes. She was wet and cold and wanted to warm up. The director refused until he got the shot he wanted which made Judie cry and freak out. Ted White, who played Jason, was so upset about this that he demanded they get her a blanket and let her get warmed up or he would walk off the set and not come back. Needless to say, Judie got warmed up very quickly.
Answer: Jason killed her. There was a scene shot but never shown where Trish discovers her mom's body.
SAZOO1975