True Grassroots Racing: 60+mph Lawn Mowers!

There's nothing more grassroots than a fast mower. This time on Faster With Finnegan, Newbern, Cotten, and Finnegan take on professional lawn mower racer and land speed record holder Bobby Cleveland in a series of ridiculous races on some heavily modified mowers. These small-engine machines usually top out at under 5 mph, but what happens when the guys push them to 60 mph and beyond?