Okay, these are in my opinion, the dumbest commercials I have ever watched.
http://www.youtube.com/watch?v=oDYJBY700G8
http://www.youtube.com/watch?v=yudW0bfBweY
http://www.youtube.com/watch?v=k-EkHuHkFvA
http://www.youtube.com/watch?v=SUxjI8BhJDk&feature=related
http://www.youtube.com/watch?v=vDogw71oGFY
I know the message they are trying to put out there, but they do it in ways that are just dumb and unrealistic(at least, in most of their commercials).
Actually the first one and the third one are quite ok. The third one is actually funny in an ironic way. The second one is meh and the rest is too new-age bullshit stuff. Not the dumbest commercials I have seen, but they are pretty lame.
My cat once talked to me when I was stoned and we had a nice conversation.