84 hours and 36 minutes.
I was in Hospital for breaking 2 ribs, and I believe I was given the incorrect drugs or something. But anyway, they kept me awake, wide awake. When I don't sleep for a while I have this insatiable fixation to check the time extremely often, like every minute sometimes for almost hours. I started doing this after the 2nd day, which is how I remember how long it was almost exactly. I updated a number in the notes on my phone every minute, or atleast every time I checked and time had passed.
That was a freaky few days.