Board Thread:General Discussion/@comment-8182446-20150131061914/@comment-24330788-20150131074815

Maybe the joke's just how absurd the idea is, having a giant talking blue jay or gumball machine walking around and having the universe be a-okay with it. I'm not sure if this so much has to do with the fourth wall then it does surreal humor. Breaking the fourth wall refers to a show (or play originally) recognizing its existence as a fictional work being watched by people. If Peter Griffin mentions Fox cancelled Family Guy, that breaks the fourth wall, but Brian Griffin knowing he's the family dog despite being able to act like a human does not.

As for Regular Show, it's inconsistent at times but I think the characters do recognize themselves as anthropomorphic beings. It's just by the laws of their universe, this is something completely normal and accepted. So Mordecai knows he's an anthropomorphic blue jay, but in the Regular Show universe that's perceived as being different from normal birds that aren't sentient, so he would be treated more like a human.