 " Cog " opens with a close @-@ up on a transmission bearing rolling down a board into a synchro hub . The hub in turn rolls into a gear wheel cog , which falls off of the board and into a camshaft and pulley wheel . The camera tracks slowly from left to right , following the domino chain of reactions across an otherwise empty gallery space . The complexity of the interactions increases as the commercial progresses , growing from simple collisions to ziplines made from a bonnet release cable , scales and see @-@ saws constructed from multiple carefully balanced parts , and a swinging mobile of suspended glass windows . Later sequences begin to make use of the Accord 's electronic systems ; the automated water sensors attached to the windscreen are used to make wiper blades start crawling across the floor , and a side door with a door @-@ mirror indicator lowers the automated window to let a part pass through . 
