What the hell is the purpose of that giant wooden wheel he pushes?
Historically, slaves are put into some sort of useful labour which benefits their captors. Entire nations have built on the backs of slaves. So why is it that James Earl Jones and his snake cult have Arnold pushing a wheel which clearly serves no purpose?
On top of this, Arnold was clearly fed well, gaining an incredible amount of muscle during his twelve years of labour. He had full time guards overseeing his "progress" for the entire duration of his toil (I always felt bad for those human billboards, wearing sandwich boards for 14 scorching hours that say "Come to Gino's: Home of the giant panini", but the guarding gig would be FAR worse!).
I think Arnold's capture was probably the snake cult's first attempt at human slavery. Maybe a sophomore effort, I don't know...but they really didn't think it through. They have this freak of genetics who could literally move mountains for them, but the best that idiot James Earl Jones and his ridiculously straightened mullet could come up with is "ummm, lets build a big wheel and, err...make him turn it."