Barack Obama was in the middle of an interview with CNBC's John Harwood on June 17th, 2009 when the he was assaulted by a pesty fly. He told the fly to "Get out of here," but the insect refused to obey.
Obama responded by felling the offending bug with one swift swat of the hand. http://www.swamppolitics.com/news/politics/blog/2009/06/obamas_flyswat_got_the_sucker.html