After the debate Republicans were quick to pounce on Biden's poise, calling it inappropriate and disrespectful -- even "unhinged."

"You almost can’t blame Joe Biden for being so unhinged. It must be frustrating to debate when you have a record that is so hard to defend and not a single tangible plan for the second term besides tax hikes," a statement from the Republican National Committee said in drawing attention to notable tweets about Biden's mirth.

Shortly afterward, the party put out a video montage of Biden grinning and laughing.

Former Bush spokesman Ari Fleischer, for example, tweeted, "The contrast between cool Ryan and overbearing Biden really hurts Biden. Biden is too hot - not effective."

Even members of the media pounced.

"Biden's smile is out of control," NBC News' David Gregory tweeted.

And Larry Sabato, director of the University of Virginia Center for Politics, added: "SNL will have to devote entire show just to Biden's facial expressions."

Read more: http://www.foxnews.com/politics/2012/10/11/biden-attacks-with-grin-but-how-will-it-play/#ixzz293uxXVrP