Liz and I were flying Michael, our three-year-old nephew, and his parents to see
Michael's grandparents in Belleville, Kansas. Michael was reaching over the front right seat, and started playing with the window latch. The latch is stiff and difficult to open even by an adult. But Michael found a way to pop that window open with the airplane at 12,500 feet, flying at 165 knots.
The noise was deafening. Liz instinctively grabbed Michael 's feet from behind while his father quickly shut the window. I do not really think he could have fallen out the window, but I did not think he could open it either.