Watch this BRILLIANT stunt by British hypno-dude Darren Brown. These two creative guys were given a quick brief then 30 minutes to conceive, execute and present a concept. It really goes to show you how much we are all influenced by everything around us. It is less of a testament to how advertising is created but rather proof that it really works by measns of the power of suggestion. Put your message out there in the places that you know your audience will be, and they'll be exposed.
Look up Darren Brown on Youtube. He's awesome!