On "Top Gear," hosts Richard Hammond, Jeremy Clarkson and James May often risk life and limb to perform feats for the show's viewers. Many of those endeavors are successful but not all are. With "Ambitious but Rubbish," Hammond presents clips from the main show that highlight some of their boldest stunt attempts -- a number of which didn't go as planned. Featured stunts include attempts to drive up an Icelandic volcano, cross the English Channel in homemade, amphibious vehicles and construct a V8-powered rocking chair.