My incident on United Dulles to Austin 08-14-2011 / agitated passenger
So there I was flying in seat 36F in the rear end of an Airbus, on the final leg of my flight from Norfolk, VA to Austin, TX. The cattle seating on this particular aircraft are arranged A-B-C (aisle) D-E-F. I am in F, pinned against the wall, with a tired gentleman coming from Europe in D and his fitfully sleeping five year old daughter in E. I spent half the flight with her alternately kicking me or using me for a foot rest, as it was after midnight / early morning for her. That I didn't mind.
There was this 'crazy' lady in 32D who kept getting up when the seat belt light was on. The first time, as we were about to blast down the runway. The flight attendant told her to sit down because we were about to take off. She loudly exclaimed that "YOU said our cell phones HAD to be turned off and MINE is up here and I HAVE to turn it off because YOU said so!" Wow, lady, how old are you, 3? Second time we were half way up to altitude in turbulence. When the flight attendant told her it was not safe to be out of her seat belt she threw herself down in a huff. Then later she started pacing up and down the aisle by the rear lavatory, just a few feet from me. When the flight attendant told her to sit down, she said she HAD to pace, and if she couldn't then everybody could just explode. Oops, wrong threat lady!
Then she claimed to be a diabetic and was given some cookies and eventually calmed down. That's the first flight I've had where they called for medical help from the passengers. By the time I got out from under the little girl, off my seat, over her Dad and down to the flight attendant to find out it was her, there were already a couple other people, nurses I think, talking to her. The rest of the flight was uneventful. Once we taxied in at Austin, a couple LEOs got on board, had a little chit chat with the lady, and took her off the plane.
This was the first time I've flown where I actually thought I might have to take somebody down. I was waiting to see if she was going to go full ballistic on the crew, and I was running scenarios in my head like nutcase/medical v diversion v system test. She certainly seemed like the garden variety nutcase and everything worked out but it was definitely an unusual and tense situation.