FWIW, Looks like the missing guy may have a gimp arm also.
http://www.browndailyherald.com/2013/03/22/search-for-missing-undergrad-expands/
The missing guy is 6 foot tall and 130 lbs. Wrong tree!
His hand is not fake, that is a standard method of keeping your hands warm, pulling them in the longish sleeves of jacket. I have sen that often on college campii.
That's his right arm and I don't think it's gimp.