Well, it can't be revenge for Guan-Shan's nuts, since Tian volunteered to twist them when it was Yi's idea. I have been told that the testicles are supposed to be the #1 most sensitive area on a man's body & that guys usually avoid attacking eachother "below the belt" in a fight because even seeing it happen to another guy causes them to feel sympathy pain. Then again, Tian seems like the sadist type who doesn't differentiate pain from pleasure.
im confused why did they put him on the tree ??