F13: The Final Chapter fact:
You know Sam, who got killed in the lake?
When they were filming Judie Aronson's death scene, it was really cold (Although, the film takes place during the summer.) and she started feeling sick when she got in the water. And as a result of spending so much time in the cold, freezing water, Judie actually developed hypothermia due to the freezing temperatures of the late night shoot.