Revealing mistake: In the scene when the crazy guy is hit in the back with the axe, when he falls, the axe sways side to side a little bit, then stops a couple inches of center from before.
Continuity mistake: When the two girls are sniffing cocaine their hair changes positions. (00:25:20)
Revealing mistake: Obvious dummies are in the car's back seats just before it slams into the wall. (01:12:35)