How horrid
I was first on a scene of a skydiving incident, and whilst there was no obvious dismemberment or other major blood drawing injuries (all internal injuries) it was still haunting to see as the person was bent in an unnatural position (broken hip, and leg at an impossible angle), as well as skull and spinal fractures. I can imagine how she must have felt, and despite being a first aider, I felt useless. Nothing I had been taught could do anything, she wasn't really conscious either. She unfortunately succumbed to her injuries later that day
I do have the odd flashback now and again, but since I no longer take part in the sport I am not reminded of it often, and so it sort of disappears out of your mind. In your case though... not sure how you cope with these sort of things, but everyone is different,. IF you feel badly affected by it, I'd urge you to consider counselling or at least talking to a professional about it to help the transition of what has happened.
All the best mate, and if you want to chat, email me. Heck I'll even give you my number if you feel that would help.