Continuity mistake: Sydney gives her phone to Liv at the prep rally to film her first dare. The case has a very distinctive blue furry case. However in one shot of Liv filming Sydney, it has a black and white case. This cannot be anyone else filming as it shows Liv's arm. Also the nail polish changes color. (00:07:20)
Other mistake: The agent infiltrates Barkawi's daughter's wedding and sends a message to the US military to bomb the place remotely. On the agent's phone he types "Barkawi on sight" and clicks send, but there is no phone number or contact. (00:04:30)
Continuity mistake: When Holland shows the bartender the dollar bill in the shape of a shirt, he is smoking a cigarette before he takes the cigarette out of his mouth. Holland mentions to the bartender that he made it himself, with nothing in his mouth, but in the next shot, the cigarette is suddenly back. (00:09:45)
Continuity mistake: Bill Pope just went off the stolen bike and is descending the stairs to the tube; people around him change completely between shots (he moves past a short haired woman dressed in black that is a few steps ahead of him, too). (00:03:50)