Well, starting at midnight, I was two hours into my very, very busy work shift. Thanks to plenty of stupid people, my shift ran over. (I work night shift police patrol in a big city.) I thanked a couple of vets of my acquaintance at the station, before going home to try to get some sleep. Sleep was interrupted twice, so I did not manage to get an all-important four-hour block of sleep. At 2200 HRS, I was back at work.