I was on a 777 out of Tibet and, about 30 minutes after takeoff the cockpit door flew open and the Abominable Snow Man comes rushing out. He goes right past us in F, goes into coach, grabs a guy in 16C, and rips his head off. He then drops the body and carries the head back to the cockpit, and shuts the door. We sit there for the duration of the flight without saying a word. (Would you?) The plane lands in HKG and we deboard. This is the first I have said anything about it since.
What I learned is that it pays to sit in F. That flight must have been hell for those around row 16, what with that headless body laying there.