Hello! this is an EASTER EGG!!!!!!!!!!!! The makers of rocket power do that! haven't you seen the blinking fish on the walls, the background skater gimmicks? pay attention!
um, geez, maybe this person didn't notice that. anyways, it happened a lot in this episode. the point? it's a slip-up, and the most noticeable in "Otto for Sale"
In Rocket Power, there is always something funny in the background. In the episode with "Slammin' Sammy", in the background a whale gets abducted by aliens. There's an episode where a kid gets picked up by a kite, an episode where a killer whale goes down a water slide...the point is it isn't a slip-up, it is meant to be FUNNY. Even if it weren't meant to be funny, how do you know he never came down? Maybe he did when the camera cut to another shot!