Comedian Dan Rainan was arrested for punching Newsweek journalist Josh Rogin at the D.C.’s Funniest Celebrity contest on Wednesday, Sept. 25, 2013, in Washington, D.C. 
 
 This year’s D.C.’s Funniest Celebrity contest may go down as the most memorable and not for what was going on onstage. Comedy headliner Dan Nainan -- a professional comedian who in the past has performed for President Obama -- got into a skirmish with Newsweek Daily Beast Correspondent Josh Rogin. Rogin sent out several Tweets during Nainan’s set. “Dan Nainan was funny until he dusted off his 2005 Katrina jokes in a gratingly bad [George W. Bush] impression,” Rogin wrote. “Dan Nainan makes his umpteenth joke about how Asians [can’t] distinguish between letters ‘L’ and ‘R.’ Election, erection we get it,” Rogin added. 
 
 Nainan then approached Rogin, who was sitting at the back of the DC Improv comedy club and punched him. 
 
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 “Dan Nainan comes over to me and says, ‘Are you Josh Rogin,’ and I said yes and then he punched me in the jaw, then he pushed me, then he walked away and about 10 seconds later he came over and punched me again,” Rogin told Whispers directly after the fight. (Whispers was also an eyewitness to the incident.) “At that point I yelled, ‘What the hell are you doing?’ other people noticed and they courted him off and the bouncers escorted him from the show room and we called the police and he’s in the process of being arrested,” Rogin continued. 
 
 Nainan was unavailable for comment about what provoked the incident, as he was being led out of the venue by D.C. Police in handcuffs. 
 
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 Dan Nainan, if you're not already familiar, is a self-described "100 percent clean" comedian who apparently has something of a temper. Performing at the DC Improv Wednesday night (along with Candy Crowley, Grover Norquist, and Ralph Nader), Nainan reportedly took offense to some less-than-flattering tweets by Newsbeast writer Josh Rogin, and according to Rogin and at least one other witness, settled it in the style of very few Twitter fights: by punching Rogin repeatedly in the face. This ended with police arresting Nainan, at least according to Rogin. In the absence of a comprehensive narrative of the evening (we've reached out to Rogin and Nainan for comment but have yet to hear from either), the tweets tell the tale. 
 
 Dan Nainan was funny until he dusted off his 2005 Katrina jokes in a gratingly bad GWB impression. #DCImprov — Josh Rogin (@joshrogin) September 26, 2013 
 
 Dan Nainan makes his umpteenth joke about how Asians cant distinguish between letters "L" and "R". Election, erection, we get it. #DCImprov — Josh Rogin (@joshrogin) September 26, 2013 
 
 Dan Nainan just punched me in the face. Not a joke. — Josh Rogin (@joshrogin) September 26, 2013 
 
 We are calling the police on Dan Nainan who just punched me twice in front of several witnesses. #dcimprov — Josh Rogin (@joshrogin) September 26, 2013 
 
 DC police arrested Dan Nainan for assaulting me. — Josh Rogin (@joshrogin) September 26, 2013 
 
 Thanks for all the support tweeps. Physically I am fine. Just not used to getting attacked for tweets. — Josh Rogin (@joshrogin) September 26, 2013 
 
 Update: A bit more substantive reporting comes from U.S. News's Washington Whispers, whose writer Nikki Schwab was on hand. Apparently Nainan found Rogin in the audience after his set. 

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– A decidedly unfunny moment at DC's Funniest Celebrity competition, at least for one journalist: While professional comedian Dan Nainan was onstage as a headliner, Newsweek/Daily Beast correspondent Josh Rogin sent out a few critical tweets. (Sample: "Dan Nainan makes his umpteenth joke about how Asians cant distinguish between letters 'L' and 'R'. Election, erection, we get it.") Apparently that didn't go over well with Nainan, because Rogin says the comedian left the stage ... and punched Rogin in the face, twice. Nainan was arrested, according to US News and World Report. "Dan Nainan comes over to me and says, ‘Are you Josh Rogin,’ and I said yes and then he punched me in the jaw, then he pushed me, then he walked away and about 10 seconds later he came over and punched me again," Rogin says. "At that point I yelled, ‘What the hell are you doing?’" Bouncers escorted Nainan away before the police were called. Nainan tweeted early this morning: "Had a blast headlining the DC improv!" Daily Intel notes that Nainan describes himself as a "100% clean" comedian.