I pulled 2 all-nighters in a row. So I woke up Monday (around noon?), and didn't sleep again until Wednesday afternoon. I slept for 14 hours, woke up for a bowl of cereal, and slept for like 5-7 more hours.
So I was awake 12PM Mon- 6:45PM Wed.
Actually, come to think of it, I might've taken an hour long nap at some point on that Monday... Can't remember.