I've seen that on the net before and im sure i've seen it on the TV also.
All of the xbox 360 adverts make me laugh, the one that stands out the most is the one where this guy is walking around some city where a army attacks him with arrows and then he comes across this big monster thing and it goes ROAR !!! at him and he goes roar back in a sarcastic way lol, that advert puts a smile on my face every damn time