Corrected entry: When the doorbell rings for Shake's pizza, he hops away in the chair to answer the door because he is still duct-taped to it. In the next scene he is out of the chair and opening the door for Oog.
Continuity mistake: When Shake, Frylock, and Meat Wad return from Memphis, they notice the door of their house has been ripped out and knocked onto the yard (Meat Wad even makes a comment about it). But as they walk inside to Mothmonsterman, the door is back on the hinges were it should be.
Carl: If you need anything, you know who to look to. Someone else.
Correction: So he got himself unstuck from the chair between "scenes".