Hans Claessens doing a onewheelie in front of the MACBA museum in Barcelona.<br /><br /><br /><img src="http://ll.broadbandsports.com/images/1705_skateboarding_onewheelie_test2.mov.jpg" alt="Hans Claessens" title="Hans Claessens" width="150" height="90" alt="Hans Claessens"/>
