It's said that wen you really love someone, you just want to shout it from the mountaintops. But here you are, stuck in an office with mountains nowhere near, what to do? AT&T's facebook app shout from the mountaintop to the rescue! Type the message you want and have it shouted by a professional Mountain Man Yeller from - you guessed it - the top of a mountain. BBDO New York did the creative work, production done by Caviar.