Continuity mistake: When Amy is making the announcement and tells Marcus to go to hell, she slams the microphone down. When the customer says it's hot, Amy responds and throws her empty hands up. In the next shot her arms are down and in the following shot she's holding the microphone without ever having a chance to pick it up.
Continuity mistake: When Amy and Jonah open the small door to the dressing room, the man pulls his pants part of the way up and is holding them. When the camera angle changes, you can see him in the mirror and his pants are all the way down and his hands are at his side. It switches back and forth based on the camera angle.