a.k.a graveyard shift.
i heard on the radio tom waits was talking about the origin of the expression graveyard shift.
"what happened in the old days, way back, hundreds of years ago, people were very nervous about being buried alive, not anymore nervous than we are today its just that the technology was not really with it. you could be taking a nap and they'd farken bury you. so, there was a law that everybody who got buried had to have a string tied around their wrist in the coffin and then they'd run it up through the roof of the coffin and then they'd go up through the dirt and then they'd go over the branch of a tree on which they'd put a bell. and then there's a guy who sits in the graveyard all night long waiting to hear a bell. that's the graveyard shift. the bell and the whole apparatus and everything, you know if you find the guy who actually is alive and underground, he's called a dead ringer"
creepy as