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.
Neogenic Nightmare Chapter 5: Mutants Revenge - S2-E5
Continuity mistake: When the targeting missiles lock onto Spider-Man, he is perched on a wall. When the shot changes, he is crouching on the ground. (00:03:05)
Behold, a Distant Star - S2-E10
Continuity mistake: When Franklin Storm is telling his children not to cry, Sue is stroking his hair with her right hand. When the shot changes, her right hand is resting in front of her right leg. (00:14:08)
Continuity mistake: In the opening credits for Season 1, when Tony is stepping into the Iron Man armor, at first you can see the bottom of his pants go all the way down to his shoes. When the shot changes, his paints are raised and you can see his socks. (00:00:20)
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)
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.