2 occasions come to mind.  Once in highschool, for no good reason.  After school, I went to work at the grocery store, the I stayed the night at a friend's house where we watched videos, then back to school in the morning, and work again that night.  I think it worked out to 41 hours or something.  I remember that I didn't get too much sleep that night either, so it was like a 3-1/2 day stretch sepaparated by like 4 hours of sleep or something.
Another time, I drove from Alaska to Oregon in 50 hours.  It simply can't be done much faster than that.  It was like 2300 miles, and it isn't like it's a long straight interstate highway.  The thing isn't even paved in places.  It was me and a buddy.  I stayed awake with him driving until I finally got tired.  I leaned back for like (literally) 90 seconds, and suddenly he pulled over.  "I'm tired. It's your turn to drive."  Doh!  I don't think he put 2 and 2 together and realized that I didn't get to sleep when he was driving.
When we got to my mom's house in Oregon,  I slept for 12+ hours.