I recall a time when my son was about 18 months old. I had him strapped into a backpack and was rushing to catch the bus. Apparently I missed my step and fell down an entire flight of stairs (13 to be exact). I was bruised and bleeding and had torn my jeans ... but my main concern was, naturally, for my child.

My fears were alleviated, though, when from behind me I heard a gleeful giggle followed by, "Again!"