What kind of car do you build for the person-with-the-secret-identity who's driven everything? Easy. You ask the Mad Hatter of DIY engineering Colin Furze to think something up. Colin never disappoints, and his new ride for Top Gear's legendary test pilot the Stig is no exception: A former bumper car powered by a 600cc four-cylinder motorcycle engine making about 100 brake horsepower. Colin details the build process for the bumper car, and will unveil the Stig's new ride in Part 2, due out March 23, 2017.