You ever see clips of Tyson working out his neck? One of those montages that pops up on X often enough that most have seen them, but since you don't frequent that dump maybe you haven't seen it. He does crazy stuff, like butt on a bench, body weight entirely on his neck, as he bends it back thrusting his waste up and down (that sounds weirder than I'd like). At any rate, if you haven't seen it, it's mildly worth the time!