Did you see the climber hit the ground? How high were you at the time? Were they on the same route as you, just a pitch higher? Maybe the person rapped of the end of the rope. I witnessed an accident too just recently.
Just this week (august 3rd) I was in Jeju and was the first person on the scene of a head on collision between a bus and car. The accident happen 3 vehicles in front of my bus. The engine block from the car shot 50 meters down the road. I saw a little leg sticking out of the wreckage of the car as my bus passed. My stomach sank and I couldn't look.
About 10 seconds later I yelled to the driver to stop and open the door and I ran about 200 meters back towards the crash. The bus and car were facing each other. The bus spun 180 degrees on impact and was facing the wrong way down the road. The driver was just looking at me in terror. His body from the waist down was smashed completely in by the dash of the bus.
In the car, there were two kids in the back seat, neither in seat belts. They both looked like rag dolls. The older boy, around 12, was folded completely in half but alive. There was fuel leaking under the bus. The driver of the bus, the driver of the car, and the passenger in the car were all trapped. The driver in the car was dead. She turned out to be the boys mother

. There was one woman laying outside who was hidden behind the bus. She had a massive head injury.
Because of the leaking fuel and the position the boys in the car were in, we moved them. I stayed with the older boy for about 15 minutes till the ambulance came. He was hanging on for his life. I just held his hand and talked to him. I wet my t-shirt and just basically tried to keep him company. After the firefighters arrived they started cutting out the people with the jaws of life.
In all 3 people died, the woman behind the bus who was thrown through the bus's windshield, the driver in the car and the passenger in the car. The passenger turned out to be the boys cousin. The next day I was able to go to the hospital and see the boys. Their dad, who wasnt in the accident was also in the hospital from shock of his wife's death.
All I got to say is car accidents are terrible. I'm glad I went over to help. I was scared to do it because of what I would see. I've had no nightmares or anything as of yet and slept fine. I feel like next time I will be able to help more.
I hope you're ok Brad. Just having to see something like that can mess with your mind. I'm glad you were able to get down ok. I would have probably forgot how to climb.