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.