Revealing mistake: When Cassie's cab passes the truck and crosses in front of it while heading to the diner, skid marks from previous takes are visible on the road to the right of the truck.
Revealing mistake: When Constance's baby is taken out of the water, she is an obvious doll who doesn't wink or move a single inch. She even cries, but her mouth doesn't move. In some shots, she is replaced by a real baby.
Revealing mistake: When Cassandra hits the ambulance brakes, skid marks from previous takes on the very same spot where the ambulance stops are perfectly visible.
Suggested correction: Not a mistake... that could be played off as just skid marks on the street (even though we know it's not).