LAS VEGAS — Former world heavyweight boxing champion Mike Tyson suffered a knockout blow when he took a spin on his daughter’s pink hoverboard. <br /> <br />“Iron” Mike, a fighter once so fearsome he was labelled the most dangerous man on the planet, took a tumble after a quick ride on the board, as seen in a video posted to his Instagram account. <br /> <br />Tyson seemed to have a handle on the situation at first, even spinning gracefully on the board as it rolled along a hardwood floor. <br /> <br />But the former champ hit the canvas when the board moved onto a rug. <br /> <br />Hoverboards have raised safety concerns in recent weeks, with dozens of reports of them bursting into flames. Several airlines have also banned the gadgets over safety fears.
