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: You can see Jeff in the scene holding a pair of garden clippers, once the camera switches to the crowd clapping and back to Jeff you will find that Jeff is no longer holding the garden clippers anymore, but they are leaning against the ribbon pole instead. (00:16:15)
Continuity mistake: When Dina is eating the banana bread, she goes from holding most of a slice in her right hand in the shot looking at her, to holding a small chunk in her right hand in the shot from behind her, to having almost none left even though only four seconds have passed. (00:01:38)