Continuity mistake: In the very beginning, Butters walks in after Cartman, Kyle and Stan talk about replacing him. Butters and Cartman sit down and talk. Firstly, pay attention to the 'Cow Day' banner behind Cartman. After the camera goes from Cartman talking to Butters then back to Cartman, a letter S is now on the banner. It now reads 'Cow Days.' During the same sequence, look behind Butters. You can see Peter Panda on what looks like a toy box. After a few cuts from Cartman to Butters, now all of a sudden, Clyde Frog is next to Peter Panda on the box.