Continuity mistake: At the end, when Beans walks into the room Louis' hands are tied in his lap. In the next shot of Louis, his hands are tied behind the chair.
Influenza: The Musical - S2-E21
Revealing mistake: During the song "Sixth Period", while Coach Tugnut is "running" on the treadmill, if you watch the treadmill, you'll notice that it isn't actually moving at all.
Continuity mistake: When Donnie climbs and lays on his new cannopy bed made by Louis, he puts his arms up to relax. But in the next shot, his arms are down.