When Brenda is thrown out the window, Alice immediately runs outside to see Mrs. Vorhees pull up in the jeep. How can this be if she just threw Brenda in the cabin?
In the scene where Alice finds Bill's body hanging on the back of the door to the generator room, the producers purposely did not tell Adrianne King what they were going to do to the body nor did they let her see the body beforehand. When she saw the body during filming it was for the first time. The scream she produced was genuine as it scared her badly. Needless to say, that entire scene was shot in one take.