Yes Sri Lankan first-class player Dhanuka Pathirana scored a remarkable 277 off 72 balls in a Twenty20 .Pathirana smashed 29 sixes and 18 fours in his onslaught. http://content-www.cricinfo.com/ci/content/story/309582.html?CMP=OTC-RSS
Was he playing against school kids who were offered toffees for getting whacked out of the park ? Seems very unreal to me !