This one ????
http://www.youtube.com/watch?v=qyVitAjE930&feature=related
Any one know of the one where there's a kid who's giant sized and he's destroying buildings and one of his friends offers him a Big mac? The kid wakes up from his dream and his friend asks if he wants a Big Mac once more and they get on their bikes but his is giant sized.
It was from the early 90s I think