Continuity mistake: The front door changes in the interior view of Jackie's house a couple of times.
Continuity mistake: At the beginning of the film the teenagers are playing volleyball, Sarah has shorts on. Then she has on only a bikini bottom. Then she has shorts on. Then she has the shorts in her hands and picks them up. Later, Jackie and Diane are talking and in the background, Sarah has her shorts back on.
Jackie: Oh, my God, the basement! I forgot there's a window in there! Give me that poker.
Diane: Jackie, you're not going down there.
Duncan: Besides, they're tongs.