just slept for 14h after being awake for 72h straight
at the end i was on my like 6th wind and it was actually difficult to fall asleep...though throughout the 3rd day I was definitely experiencing microsleeps. it was a weird sensation where you would literally fall asleep for like 1-3 seconds without knowing it, no matter what else you'\re doing, and just feel really disoriented for a few seconds after.
https://en.wikipedia.org/wiki/Microsleep