When going to the party, there is a sign that says "no employees allowed". He removes the sign with a snatch and holds it in his hand. Next shot it's gone and is neither in his hand nor on the floor.
After the first Mob scene, when Eddy is showing the YouTube video, the title says "The MOB - Hits Ocean Ave". Not long after they walk into the kitchen at the hotel, a news report about The Mob comes on the TV, making reference to an "Ocean Drive" not "Ocean Avenue".
When Moose dances, his jacket's hood is on in close-ups but down in longer shots.
When Mr. Ryan and his colleagues are watching the second mob, he is right beside them. In the next scene, he pushes through as if he had just arrived.
In the office mob scene, when some of the dancers, dressed in suits, are descending the escalator at the start of the performance, the people standing by the railings at the top of the escalator disappear, reappear and move around between shots.
After two of the members of 'The Mob' are arrested, they say that the contest rules on YouTube don't allow any criminal activity. If the contest doesn't allow any criminal activity then how was 'The Mob' still able to upload those other videos before raiding the Anderson Corporation party?
In the scene with Moose when the camera gets close his jackets hood is on but when the camera zooms out the hood is off.