Revealing mistake: Establishing shots of the party where Chaney will fight Pettibon's guy; when we see the band play and people dance, the footage is rather obviously stopped and reversed to give the impression of a longer shot (evidently they had too little usable film of the crowd dancing). (00:31:00)
Revealing mistake: After Pettibon strong-arms the protagonists out of the bet, Chaney makes a cryptic proposal to Speed, about driving around and seeing the sights. There's a shot of the car that not only feels 'off' because it's sped up, but also sees the stand-in for Poe and the one for Chaney have swapped position. (00:37:00)
