[discostu]

I don't think the parent eating thing was supposed to be funny in it's own right, but it worked as setup for future jokes. A couple of times since then Stan and Kyle have warned kids not to mess with Cartman because "he'll make you eat your parents... no seriously he will". And THAT'S funny because it's just the kind of dumb thing juvenile kids would say as a stupid threat but it's absolutely true, Cartman will make someone eat their parents we've seen it. It also setup his company to help kids get revenge on their parents.

[job]

which lead to the episode where he helped butters and Kyle for hiring actors to play future time warped butters and Kyle to discourage them from taking drugs.

"use the texture roller, felipe. this is coming together nicely."