taken from a thread on the Canyoneering subreddit:
https://www.reddit.com/r/canyoneeri…ter_the_first_rap_in_observation_canyon_zion/
“You always know the risks of canyoneering, and (hopefully) take all the precautions you can to make the chances of any of those risks from happening. Still, even all that you can do, shit still happens sadly. Yesterday started as a normal day, a little later for a canyon than usual, but it was still nice and we had an easy day ahead of us anyway. Things went smoothly, people were having fun, and the little bit of water we encountered wasn’t too cold. Sound nice, right?
That changed. Fast.
On R5 (120ft) I encountered an awkward wet spot and while getting around it the rope slipped out of my feeding hand under me. Tried to grab it again, to gain extra friction, but the rope was too wet and my gloves as well, and after a moment I couldn’t even find the rope above or below me. That 100ft fall felt like ages. I remember kinda going “oh shit.., ohohh…OHH FUCK” and yelled as loud as I could the rest of the way down. I bounced a few times, hit my head, back, head again, hip…and as I closed my eyes to accept my ticket outta life, I hit water. Thank god it was there, thank god it was deep, thank god for the friends I was with that got me out quickly, because without all that I wouldn’t be here.
Luckily all I have is some bruising and a few pelvic region bones broken. But in all the canyons I’ve run, I never expected this. It came as a shock, and still is as I’m writing this from my hospital bed. I’ll keep hitting canyons as soon as i can; I can’t stay away from doing my favorite thing.
I just want to plead with you all, review those risks. Double check everything, then check it a few more times. As much as you can don’t rush, unless you absolutely need to. And just learn. Learn what to do in every situation, good or bad. And never, never go alone. Take some strong people you trust with you.
Most of all, be safe, and keep lovin the cramyuns <3”
In a 2nd comment, the user reported the loss of control could have been mitigated by starting the rappel with more friction.