A few months ago I was on a flight that had to return to Toronto due to a medical emergency. I believe it was caused by an infant falling from the changing table and hitting his head quite badly.
The changing facilities in most of today's aircraft are extremely cramped. For me and my wife, changing a baby on an airplane is a two-person job: one of us is doing the actual changing, the other right outside the lavatory holding/passing things as necessary.
I must say BearX220's on-the-spot upgrade is giving me ideas...