He'll also get a bit of a reprimand for not zipping up. Every Tour at least one guy does this, and sometimes we learn that they then got into a little trouble for it. It is a shining moment for the sponsor, the money shot if you will, the photo of the winner crossing the finish line, proudly displaying the name of their sponsor. Shirt unzipped = no sign of the name of the people forking out all the money for the team = unhappy sponsor.
That said, I'm surprised more don't just fall off their bikes out of losing their concentration due to sheer exhaustion and joy. :) He was great to watch, I love these stages so much for the 'who is that' ? factor. It's making it very hard for folks to pick the winners in the RoadID daily contest. :)

