Video: Mark Cavendish responds beautifully to impossible question on doping (NSFW)

As comebacks go this is right up there

Cycling continues to battle against the stain of doping and the spotlight that has attracted is well merited, but we've heard enough riders asked vague questions about the sport's image to sympathise a little bit. Ahead of the Tour de San Luis, which started yesterday in Argentina, Manx Missile Mark Cavendish was the latest to be faced with answering the impossible question of 'How can you be sure cycling is 100 per cent clean?' and we have to admit his profanity-laced answer is pretty great. https://www.youtube.com/watch?v=3j8PoCtrLIQ#t=92