Revealing mistake: When Samantha kills Mrs. Parker by crushing her head with the basketball, the dummy replacing the woman is visible.
Revealing mistake: When the bully's held up by Sam wires can be faintly seen.
Deadly Friend (1986)
2 revealing mistakes - chronological order
Directed by: Wes Craven
Starring: Kristy Swanson, Anne Twomey, Matthew Labyorteaux, Michael Sharrett
Revealing mistake: When the bully's held up by Sam wires can be faintly seen.
Tom: Hey, she's dead? Hey, what the hell are you doing, you didn't say anything about a dead body, we were supposed to save her life.
Trivia: Kristy Swanson received coaching from a professional mime in order to properly move like a cyborg.