Looks like a Suffolk Punch stallion (yup, I have a thing for draft horses and play this identify-the-breed game alot). See this link http://www.ponybox.com/news_details....k-Punch&id=604 scroll down about halfway to the small pictures of the stallions -especially 3rd from left.
He is total garbage! Quick! Hide him on my trailer (Petstorejunkie).
Okay, that's not the exact horse I thought of, but I can't find the picture of the one I wanted so that will have to do. But yeah, it would be interesting to see how much of that is muscle and how much is jiggle when he moves.