Joe Biden keeps smiling through Paul Ryan's responses and Twitter is buzzing about it. | AP Photos Twitter frowns on Joe Biden's laugh

Vice President Joe Biden and Rep. Paul Ryan were the two candidates onstage at Thursday’s vice presidential debate, but a third character emerged: Joe Biden’s laugh, which didn’t escape the notice of tweeting politicos. (And led, of course, to at least three satirical Twitter accounts: Laughing Joe Biden, Biden Smirk, and — yet another — Laughing Joe Biden.)

Weekly Standard’s Mark Hemingway: “Joe Biden’s laughing through talking about Iran sanctions?”


( PHOTOS: Scenes from the VP debate)

TIME’s Michael Scherer: “Not sure debate cameras have been light tested for Biden’s teeth. Best to watch with sunglasses.”

Washington Examiner’s Philip Klein: “Biden’s strategy seems to be to laugh at Ryan constantly. Will it work to infantalize Ryan, or backfire like Gore sighing?”

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NBC’s David Gregory: “Biden’s smile is out of control.”

BuzzFeed’s Ben Smith: “So did Biden practice laughing at Ryan???”

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ABC’s Rick Klein: “Biden on verge of breaking down in laughter when Ryan talks.”

Former Eric Cantor staffer Brad Dayspring: “Joe Biden needs to realize this isn’t a Senate Foreign Relations Hearing. His laughter and condescending attitude is a disaster.”

( PHOTOS: 10 great debate moments)

Radio host Neal Boortz: “Looking like Biden’s gameplan is to laugh his way through this.”

Townhall.com’s Guy Benson: “Will Biden laugh his ass off at the terrible economy, too?”

( See also: Complete coverage of the VP debate)

MSNBC’s S.E. Cupp: “Biden needs to laugh a little less through the Libya, Middle East, nuclear Iran segment.”

The Washington Post’s Chris Cillizza: “Ok. I have decided. I find the Biden smile slightly unsettling.”

( Also on POLITICO: 5 things to watch in VP debate)

PBS’ Jeff Greenfield: “Biden has always had a smile that at times is really, really inappropriate.”

Washington Examiner’s Paul Bedard: “Can’t tell yet if Biden’s smirking, laughs, eye-rolling, head shaking, works for him or not against the oh-so-young looking eager Ryan.”

Former White House press secretary Ari Fleischer: “Biden is at risk of having his laugh come across like Gore’s sighs. He should knock it off.”

The New York Times’ Ashley Parker: “Biden’s grin is Chesire Cat caliber.”

Republican strategist Ron Bonjean: “Biden laughing does not come off with the intended effect. It is actually hurting him. Looks very condescending.”

Movie critic Roger Ebert: “Joe! Stop smiling and laughing!”

Washington Times’ Emily Miller: “Biden laughing when he disagrees with Ryan is so annoying. Like a child in time out.”

Washington Post’s Jennifer Rubin: “Biden’s laughing is losing the debate- obnoxious”

Comedy Central’s Indecision: “If this keeps up much longer, Joe Biden’s going to sprain his laugh muscles.”