Character mistake: In the first scene, the Broslofskis are lighting their hanukiyah. It is the first night, and the lone non-shamash candle is on the far left side as they look at it. However, Hanukkah candles are placed in the hanukiyah starting from the right.
Continuity mistake: When Cartman is trying to convince Butters that a meteor is heading to earth, Cartman jumps on a Terrance and Philip chair when dangling the rock in front of the telescope. The letters T and P on the chair are pretty much across from each other and above Terrance and Philip's head before and after Cartman gets on/gets off the chair. When Cartman is doing his calculations in the next shot, the letters T and P on the chair are now in a different position on the chair and if you look under the letters you can also see that Terrance and Philip's head have also changed positions.
Add timeJustin Davis