When I was 7, me any my neighbour played this game on the sidewalk, you'd run back and forth underneath one of those sprinklers that arc, well, I slipped when I was running and ended up skidding about a good 2-3 feet on my knee, that was painful.

Then there was this time I fell on some stone steps going into a friends place and my forehead hit the corner of the step, right between the eyes..