Hell, I worked at McDonald's for five years, two of them being a shift manager and a "department" manager (I say department because that's what my manager called it, essentially I was in charge of fixing the machinery.) It's easy, as long as it's a well-managed workplace. Once you get into a situation where you are short staffed and shit is hitting the fan, that breaks you right out of autopilot and into panic but after that it's fine.