Continuity mistake: When Randy and Stan leave the dinner table Sharon tells them about her friend Abby, and there's a table beside the front door with two drawers, but when Randy opens the front door the table now has legs and the drawers are gone, then it reverts back. (00:11:30)Super Grover
Continuity mistake: When Michael Jackson returns to Purgatory, keep an eye on Patrick Swayze. He is shown sitting on the left hand side of the front row. His clothes change from the black shirt and pants he wore in Dirty Dancing to a black fleece with a grey shirt and lighter grey pants. This clothing change occurs multiple times throughout the scene. (00:21:05)Casual Person
Other mistake: When the guys play Lady Gaga's "Poker Face" on Rock Band 2, there are a few problems. The TV screen shows 4 people playing (the guitar, bass, drums, and vocals) when actually 3 people are playing, the TV repeats itself on a constant loop, and there are no lyrics on the screen shown. Also the drums go from right to left: blue, yellow, red, and green. The drums are supposed to go red, yellow, blue, and green.