Corrected entry: When Terri goes outside to go home, as she walks towards her bike, you can see someone upstairs walking by the window. Must be a crew member because Tina and Jimbo are in bed having sex and Ted, Sarah and Doug are watching the film downstairs. Paul and Samantha are dead. There is nobody left in the house. (00:51:15)
SAZOO1975
18th Jan 2008
Friday the 13th: The Final Chapter (1984)
Correction: She's looking upstairs because she knows her sister is up there. But the shadow is a different window. Different shape.
Correction: It was her twin sister in the window. She even says "You slut!"