. >> to celebrate the new series of top gear, bb krarc worldwides to lend you a stick for the day. >> for those who don't know what top gear is, it's a world famous show about the cars and the stig is one of the characters on the show. >> in return we want you to build something for us. >> depending on what part of the world you're in, this will be a nice ride. we need to make it fast, like scary fast! >> this is a child's dream come true. how many times do you get in the bumper car and wish that thing could -- >> collin sets off to refurbish this thing. >> you say refurbish. >> well, you could. first he's got to take off the heavy base. takes the body off, starts building a new bumper platform, you know. then begins building a brand new chassis. he's got go-cart wheels in the back and go-cart wheels in the front. and it's going to be scary and unstable, but it's got to be fast. >> let's try one of these. >> he's putting a motorcycle engine in it. four-cylinder, 100-horsepower inside the tiny bumper car. >> is this where we finally find out if the stig can die? >> i hope not. >> he ma