When I was in college, one of my summer jobs was working at a Cumberland Farms gas station/convenience store. I was theoretically on second shift (two in the afternoon to eleven at night), but the guy who worked graveyard shift during that summer consistently called in sick. Like, every other night.
And if you're the only person working at a 24 hour store, you can't just walk out at eleven just because the paper schedule says that's when you get to leave. Suffice it to say, I got an awful lot of overtime that summer (and on one memorable occasion worked for 26 hours straight).
And this song seemed to be on the radio almost non-stop, it seemed, kind of like rubbing salt in open wounds as I mopped the floor and bleached the coffee urns and inventoried cigarettes and stocked the milk and six-packed loose beer and ... well, you get the idea ;-)