do you work at a chain?
one of my buddies had a stint at PizzaHut, and he got shafted so many with shifts and re-scheduling because the manager would hire new kids all the time that he just up and quit out of the blue during one of the biggest weekends of the year (i think it was the either the UI game, or the USC game), just to fuck with his boss. granted none of his co-workers really liked him after that. anyways, theres my wicked awesome story.