>> where the idea in place, they hire designer cristo holloway to make the design a reality, or something that looks like reality. >> believability has to be an element. >> the helmet is an existing motorcycle helmet. this control panel has been painted. the shaving cream was out of aluminum with a brass finish that looks slick. and then supposedly the shaving cream goes through this tube into the blades. on the inside we have the aluminum bar with four razors attached to it. it moves back and forth. >> so if the helmet doesn't actually shave your head -- >> how does it feel? >> what really happens in the video? >> a little strange. >> let's ask the expert. >> so at this point right here is where i thought they interrupted the take, had a chance to shave the guy's head and put the helmet back on and combine the different take in this camera move, sort of a fancy digital transition. >> nope. more low tech. in a world of digital tricks. this one outsmarts the expert. >> we pull the switcheroo. we look exactly alike. >> james and michael cast up and coming twin comedians to star in the video