Sorta Strange Saturday

Who knew chess boxing existed?! I wouldn't have if an acquaintance hadn't posted about taking a class in this combination sport on Facebook. While the chess part may invoke images of brainy boys, fear not, the participants have the beef and brawn of boxers:

Chess boxing [Wikipedia]
Chess-Boxing [florent quenault Flickr set]
Swedish ChessBoxing Sensation in London [ChessBase]