He may be our favorite angel-turned-Winchester-sympathizer, among other things, but Supernatural's Castiel is also the master of the cute quip. His best lines, of course, were delivered when he wasn't even trying to be funny, and the clueless angel's meat suit looks even more hilarious as he quizzically wonders what he said to make us laugh. There are a few one-liners that Cas tried to make out of his own volition that ended up making us chortle even if they weren't delivered as he intended.