When I was young and stupid, a friend and I decided to stay up for 48 hours. I only made it to 42 hours, and even in my sleep deprived state I realized that it was a stupid idea and finally went to bed.
These days, I do stuff like that professionally.
Sapphire crystals wait for no man, which means my work schedule revolves around big furnaces and I get to go nocturnal for a few days on occasion. Sadly, the rest of life also waits for no man. Being not quite as young, but still mostly as stupid, I once again find myself scheduling things that make me question my sanity. I'll be at work until a touch after 8am this morning, which gets me home around 8:30, and we don't have to leave for church until 10:45, so I should be able to squeeze in about 90 minutes of sleep in there, before it's off to church, a home teaching appointment, a birthday party, a dinner party and then home.
I can't say it's my preferred schedule, but, it's just how things come out sometimes. Evidently sleep management is not one of the things that I learned in college.