I took a similar tumble down a cliff by the ocean when I went looking for some friends I was rock climbing with. Turned out that they chickened out and went back pretty early on and that's why I couldn't find them. I kept climbing higher to see where they were and came across some loose rocks that sent me sliding down the cliff with most of my skin being eaten away by small jagged rocks before catching onto a big rock hanging over my otherwise inevitable death plummet.
I ended up climbing all the way back and then washing the wounds in the water...what a BURN! Once the wounds settled in, I couldn't walk for a good month or so due to major swelling and just sheer pain of any skin on my body stretching slightly.