I am just amazed that even Biden could be that PR-challenged. To say he was a rude, arrogant jackass doesn't cut it. I will have to invent new swear words to do any justice to describe the depth of his incivility.
A lot of people would expect me to greet this with gleeful schadenfreude, and yes, this is a gift to the Romney/Ryan ticket. But it freaks me out to see the Vice President of the United States act this childish.
You know what he comes across as? A troll. Biden was acting the way an Internet troll would act if it were possible to interrupt people in online forums. (That people can't interrupt you is one of the reasons the Internet is a superior medium for debate.)