Went on a school trip to Alton Towers that involved leaving at 1am, getting to the park at 8am, then setting off back home arriving at midnight... but also left on a school day so I had been up since 6 the previous day - awake for 42 hours total. Collapsed on my bed when I got home and slept for about 18
When th'wife was a teenager, apparently, she was really ill and went for a sleep... and woke up 26 hours later
. She thought she had napped for 2 hours but a full day was missing. I'm pretty sure that qualifies as some sort of coma?