YouTube Description: Mr Porky Presents Dirtquake III: Scratching in the Dirt featuring Guy Martin. Guy gets to race something oddball in the dirt and he’s not the only one. Dirtquake is Guy’s favourite motorbike event and this is a look at why. Film shot in the perfect British summer of 2014. Thanks to Mr Porkys, Sideburn and of course the riders for making a great show.