>>94758680Well there's the fact that noodle physics doesn't make sense as a concept, that's part of the joke here.
Reginald thinks he's smarter than he really is (as well as handsomer, more skilled, fitter, more popular and moral). His stupidity gets highlighted a lot when contrasted against his self image. Beartato is slightly more intelligent than Reginald but naive, goofy and willing to totally go along with him. That's how he switches between being the straight man and the sidekick.
tl;dr: they're a halfwit and a goofball