Continuity mistake: At the start of the scene where OK arrives at the ROR house for the mid-game party, it is obviously dark inside except for flashing blue and purple lights, seen through the windows. However, when the OK gang enter the house, it isn't dark anymore and the blue and purple lights are gone.
Continuity mistake: In the scene when Mike is at the school door lab. When he swipes the access card the door swings out. But when the campus police try to get in it is blocked from the inside, indicating the door opens inwards.
Continuity mistake: When Mike and Sully move into their bedroom at the fraternity house, the door opens inwards. When they fall through the doorway, it opens outward.