Herschell's gooch arm...
What was the deal with Herschell's arms? Did anyone else notice that they were horribly discolored?
You can even see the other actors' disgust in the film whenever they accidently touch a portion of his gnarled arm flesh.
Is it possible that he was burned by napalm or something in the war? That could be where he was first introduced to the "hard stuff," courtesy of Brad Grinter, the naked medic.