I went to a convention a long time ago and made the mistake of not booking a room in advance. I got there and every hotel and motel in the area was full. So I stayed up for 4 days straight.
By Sunday, my brain kept falling asleep while I was awake and it was really trippy. I was doing crazy stuff like throwing paper airplanes from the balcony in the hotel lobby and climbing over the furniture. I think I spent at least an hour staring at the ceiling in front of the elevators.
And then I had to drive home from Buena Park to San Diego. Luckily I'd decided to leave at like 2 am, so there was very little traffic on the freeway. But my brain kept telling me I was asleep and if I'd thought that I could drive off the road, I probably would have. I don't remember anything about the drive, but I managed to make it home in one piece and then I slept for about 16 hours straight.