I was at mandy's house one night a coupla months back. No one else was in the house besides mandy, her sister and I.
I went upstairs to wash my hands in the bathroom and came trotting out, back down the passage. When I came to the small flight of stairs (4 or so) I did a kind of hop-skip-jump where I was planning to land on the 2nd step from the bottom and then carry on down. The hop, I think, was my downfall. (ooh...pun

)
My foot kinda caught on one of the stairs and I started to falter as I hit the bottom. I was stumbling, head dangerously close to the ground, for what seemed like an eternity. Before I knew it I was in the living room, with more stairs looming.
The 2nd set of stairs proved to be too much for my flailing limbs. I finally fell over and proceeded to fall down the stairs into the living room, sliding a good distance over the laminated wood-floors. mandy and her sister came running from the kitchen, only to burst out laughing when they saw what had happened.
They remind me of that incident as often as they remember.