What I hear is Fozzie saying something along the lines of "waaaaaa" Followed by Kermit's "Heads up below!"
I've never really thought it to be anything else.
But then, I could be wrong. I'm wrong a lot. I'm very GOOD at being wrong, yes, yes I am! I am also very good at losing. Oh, and I'm particularly skilled at magnetically attracting basketballs, baseballs, volleyballs, footballs, soccerballs, wiffelballs, hockey pucks, etc. to my head. Honestly, I'm the only person I know to be sent home from school with a concussion from a wiffelball. But I digress. As usual. I guess I should add to my list that I'm very good at rambling. Well, I've added my two cents. Didn't make much sense, did it? I stopped making sense a long time ago. I found it is much more profitable to make dollars.
Ok, I'm done now. Sort of. I think. -ish. Somewhat. Partially. GAAH! Me be insane, yes, yes me be.