Continuity mistake: When Bobby, Shelly and Becky are talking at the diner, Shelly's mug is constantly moving between shots without her touching it.
Continuity mistake: When "Dougie" is taken out of the limo in the desert, the box containing the cherry pie that he's carrying is closed and then suddenly open between shots.
Continuity mistake: In the vortex and headless corpse scene, Gordon's US flag pin on his suit keeps moving between shots without him touching it.