What is the most epic all-nighter you have pulled?

It’s finals time and I’m running on three hours of sleep. When to bed at 3:00 and woke up at 6:00, studying for World Civ. Now, this isn’t very epic, but this is the least amount of sleep I’ve ever intentionally gone with. What is the most eipc all-nighter you have pulled? What is it about college that makes people do this? I’ve never waited until the last minute to study and forgone sleep until I was in college.