Continuity mistake: When the class is in Arnold's esophagus, Tim says something, then it cuts back to Ms. Frizzle. Arnold is sitting in the back seat of the bus.
Continuity mistake: When Mandarin and MODOK are watching the satellite pass by, they are positioned close to each other. When the shot changes, they are suddenly several feet apart. (00:11:49)
Coach Fussell's Lament - S2-E5
Continuity mistake: Chairface and Chrome Dome arrive at the Brianchild's house in the same car, but drive off in separate cars.
Continuity mistake: To beat the traffic, Coop skateboards inside a construction pipe. The pipe is on the back of a truck, so it's not exactly very long, and gets picked up by a crane arm mounted on the truckbed itself. However, Coop takes ages to come out of the pipe, and in the shot from inside the pipe it looks as if is dozens of meters above the street level, which isn't. (00:08:00)