I have really steep stairs in my appartment. I have fallen down several times. My wife too. My little son (I don't remember how old he was, just old enough to start walking down the stairs) fell from the top to bottom, as my wife chased him down saying "%hit" again and again. He cried for a few minutes. Then after he was supposed to be asleep, we heard him saying something in his crib (he had just learned to talk, Gun was his first word, Dad was right after that, and his third word was "%hit"). We peaked in on him, and his foot was stuck in the bars. He was trying to pull it out, saying "%hit" over and over. Then, the next week at my Mom's church......he dropped a toy car in church, and "%hit" right out loud in church. Luckily he stopped using it after a few months.
The scariest thing in the world is seeing you kid tumble down the stairs (usually hitting the base board heater at the bottom for good measures). Hopefully your kid's head is better.