I've stormed out on all of them, except my last one. This one, I just told them, 'No, I'm not doing the more stressful job anymore, and I'm taking next week off. When I come back, I want to go to my old position.'

If they don't want to give me the old position back, then they have to fire me, and I haven't heard that yet. I did get the time off approved, actually by my boss's boss. It's probably not going to be fun going back monday, but I'll still be making the same wage while I look around...