Here's a step by step demonstration of what happened:
I was body surfing on a wave.
The wave was a little too strong.
I flipped over.
My face hit the sand and scraped it
(PWNED)
I kept rolling.
I lifted up and slammed on my back.
(DOUBLE PWNED)
Now my face has scabs, but my backs okay.
And for people who think I'm a wimp for being cut up by sand, wet sand is a non Newtonian fluid.
http://en.wikipedia.org/wiki/Non-Newtonian_fluidIn other words, with pressure, it acts like a solid, with no pressure, it acts like a liquid, and that sand is hard as a rock (:3) when you slam into it