Revealing mistake: After the guy gets killed in the alley, he lifts his arm to allow the other guy to drag him away.
An American Summer (1990)
1 revealing mistake - chronological order
Directed by: James Slocum
Starring: Brian Austin Green, Michael Landes, Joanna Kerns
Continuity mistake: Tom and Finn bury a rope in the sand after tying it to the lifeguard stand but the next day they pull up a chain instead.
Kari: I'll bet you my thongs.
Finn: OK, I'll bet you my underwear and raise you a truth or dare.
Kari: What? You can't bet a truth or dare!
Finn: Just because I ran out of clothes doesn't mean I can't still bet.