Continuity mistake: When Norville grabs Amy at the juice bar, there is a shot from behind Norville showing his noise maker is perpendicular to the bar. In the next shot, the noise maker is parallel to the bar. Later in the scene, the noise maker gets crushed under Amy's purse, and then reappears uncrushed next to her purse.
Continuity mistake: When Norville stands up and pays for a coffee after reading the job listings in the newspaper, you can see a tall glass container is an arms distance from the nearest two ashtrays. Yet a few seconds later, when we hear Tim leave the cafe, the glass container is next to both ashtrays.