I was 12, on my back patio (made entirely of bricks) scootering and trying tailwhips. I decided I needed more height and didn't have a jump so I took the picnic table that was on the patio, started at the far end and pushed. I decided that I would take a practice run first so I didn't try the trick, just popped off the end as high as I could like a badass, then got a little bit forward. Now when you think about a scooter, there are handlebars and I had no time to let go of those, so I let my face take the brute of the impact on the edge of said patio. I killed one tooth, destroyed my lips. Essentially, I curb stomped myself.