Really, how long would you say you have gone without sleep? That is, the longest time you spent awake before finally having to sleep?
For me, it would be about 4 days in length. Sufficient to say, I had a weird dream when I finally did fall asleep, because of lack of sleep for that long.
Just over 48 hours and never do that again, Partly since I wake up at 5am to catch three flights and I never can get any sleep on aircrafts. From Tas to Sydney then to United Arab Emirates to London.
I think the longest I went without sleep was probably around 36 hours but that was when I was younger and I could handle it. I have to have my sleep now.