As Joe Biden and Paul Ryan tore into each other over chewy topics like Iran and tax during last night's TV debate, there was only one subject preoccupying tens of thousands of viewers - the Vice President's glaring toothy grin. Within minutes of the debate starting, Twitter was abuzz with users taken aback by Biden's behaviour and sent out mocking messages. One parodied his a trademark soundbite: 'For those brief moments you don't see a #BidenSmirk on my face, know that I've got a #BidenSmirk in my heart.' Scroll down for video Hilarity: Joe Biden smirked his way through the vice-presidential debate in Danville, Kentucky
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Web users set up parody Twitter accounts for 'laughing Joe Biden'
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GOP turns constant smirking during debate into online attack ad
While his smile was dismissed as patronising @placeholder, his teeth could have been part of a shock and awe tactic on his opponent.