Yeah, I did something like that too. After pulling an all-nighter hacking, a day at work and a beer or two at the corner pub, I got home about 6pm, lay down on the couch and fell asleep. I woke up, saw that it was 8:30. I thought I’d slept all night. Got up, changed, and headed for work. I started wondering why there wasn’t any traffic, but it wasn’t until I pulled into the lot and found no one there that I realized it was 9PM.