Other mistake: There are several moments while using the clown dummy toy that make it very obvious it is an actor in a suit. Most obvious of which is that it somehow 'senses' things like the momentum and orientation of the person controlling it, when all it is shown to do is copy muscle movements/motor skills. There are far too many examples to list.
Other mistake: When the FBI agent says "Maybe it's time to get a real job" his partner can be seen mouthing the same words.
Other mistake: The bus Frank is in crashes through a wall of items, at speed, but no visible damage is done to the front of the bus when we see it later. (00:55:05 - 00:55:40)