You missed a lot only listening to it. You didn't get to see his smirking, grinning incessantly, and you might have not heard all of his muttering while Ryan was speaking. According to a Drudge link, Biden interrupted Ryan 82 times. Sounds more like a Charlie Sheen "winning."
Did you notice how many times Biden said “I was there”....talking about when obama did this and that?
I expected him to say “I was takin’ a crap in the bathroom off the Oval Office and I heard the president. He said ‘Close the damned door, Joe! And how ‘bout a courtesy flush! I’m tryin’ to be articulate but the smell is screwin’ up my thinkin’.”