Reeeeally wonky clip from an episode where the kid gets a telescope that warps things to new proportions. He tries it on his mom, who wants to lose weight, but accidentally makes her fat. We get a few scenes with her but for most of the episode she's absent. At the end, he reverses the transformation, but makes her so skinny the wind blows her away.
http://youtu.be/gkNLSvxAyu0?t=5m39s