I was flying a kinda long haul flight, something like 4 or 5 hours. The previous day I had partied with my friends so I figured I'd do the climbing, leave it in autopilot for the cruise and take over for landing.
So I climbed to FL 360 and went to "nap"
Six hours later when I finally woke up, after punching several times the snooze button on my alarm clock, I find my Airbus 330 doing circles at FL 360 above the destination airport :O
So I quickly set a course away from the airport and start like a 3000 ft/m, full spoilers, contact the tower, request ILS and start circling around to it :S
When I touched down I had little more than 15 remaining minutes of fuel...
If ProPilot had a penalty for "Pilot fell a sleep during flight", I would have gotten it :O
I wonder what my passengers thought of that flight and how the stewardesses explained the situation to them
"Hum yes sir, this is completely normal. Our Captain drank too much last night and he's a sleep, we will land as soon as he wakes up. Do you want peanuts?"