I used to do plenty of all nighters in the old days but on one occasion I did 3 complete 24 hour days. It was pretty strange, everyone went home and it was like "bye" next morning they're all back and I think I'm nearly finished, "yeah, I'll be going soon", but that dragged on through the night, and again the next day and night. Didn't (seem to) do me any harm but I spoke to someone who did similar and he was convinced he suffered some sort of brain damage.
I'll wager there's some good horror stories out there.
I'll wager there's some good horror stories out there.