OMNI: SNA-ORD flight I talked to the FA most of the flight. One thing that came up was strangest things that have happend to her on a plane.
Her story: The FA asks a woman in Buisness Class with a lap child to place her child seat in the overhead bin before takeoff. Then when she is doing the final passanger count, there are no "laps" reported. She asks the mother where her child was. You got it! She put the child in the overhead bin in the child seat. When the FA goes to get the child from the bin, the seat (and the child) are missing. They make an announcement over the PA asking if anyone has seen a baby in a child seat. Now for the truely amazing, another Business passanger (a 1K according to her) rings the call button and says he moved the kid back to a coach bin because he need room for his garnment bag. All turned out well and the child was indeed found in the coach section overhead bins.
FA said this sort of thing is often cited as one of the "rumors" that go around but that it happened to her. To believe or not to believe, that is the question.