Why does he keep doing that with his shoulders?

I'm shamelessly ripping off this link from ETP, who in turn ripped it off from Cake. You can thank me later when you can't get it out of your head, even if you don't know whether or not it's comprised of real words because you're an ignorant monolingual. Seriously, you can't tell me that isn't the best new song you've heard in awhile, and the best video you've seen in a long while. Considering the utter shit that's out there, that last statement was made with no sarcasm whatsoever. Okay, maybe a little.