Christoph Huber posts:

Happened in October of 2013 but didn't share at first, I needed
some time to recap for myself. I was very lucky to walk away from this with
"only" a pretty bad concussion and a compressive injury of my spine, but no
fractures, fortunately. (And about two Days of my life got cleared from my
memory)

Video
here.

I think I've had enough speed for the final turn and approach, but it looks like
I overestimated the airspeed after the last turn and underestimated the slope of
the landing site. Watching the video you can see that I had to slow down a bit
in order to get over that last tree safely, so if the downwind leg of my
approach would have been clear of obstacles I probably would have had that extra
10 k I thought I was having.  What I take with me from this, besides the
occasionally aching neck, is that I won't try maneuvers like this at landing
sites with restricted obstacle clearance again.