This is from the episode Real Veal / Celebrity Wife Swamp.
Summary of Skit
2 kids figure out that something stupid makes Mexican jumping beans jump.
(A Mexican jumping bean jumps out of the can.)
Kid 1: Mexican jumping beans? I wonder what makes them jump?
Kid 2: I don't know. Something stupid, I guess!
(Camera zooms inside the bean. Something stupid goes on. After it finishes, the scene zooms back out to the kids.)
Kid 1: Yeah, something stupid.