When I was little, I woke up in the middle of the night, at 11. (fell asleep at 9) So I left my 2nd floor room and proceeded down the stairs. The stairs have a wall on the left side, but not on the right. On the right, it opens out to the foyer. Our house was still being finished around then, so there were no railings on the side that opened out to the foyer. I fell. Luckily, my mom was on the phone right in front of me. She caught me, dropping her phone. I had bit through the skin between bottom lip and chin, though, so I went to ER and they stitched it up.
Also, once my friend's bike wiped out right in front of a car and he almost got ran over. :o