Not from liveleak, but a couple of years ago I read an article about a guy that got stuck in a cave a few km from the entrance after falling head-first into a crevice, and eventually died because nobody could get him out. It gave me nightmares for weeks, and even to this day just thinking about it makes me shudder. It's almost PTSD, even though I only read a second-hand retelling.

Last year I was leaving my house to walk my dogs when my neighbors dog jumped their fence and attacked my dog. I had airpods in, so I didn't hear anything until my dog literally screamed. I was able to turn around and hold my dog steady until my neighbor hopped his fence and got his dog off.

Overall it could have been much worse; I have friends that have much worse stories. My dog had a handful of puncture wounds that healed up, and he is fine now. I am pretty sure I had PTSD or something close to it; mainly it's waking from nightmares of the scenario, and thinking of my dogs scream still makes me shudder/feel sick. I also now walk outside and check my yard before letting the dogs out and stay out there with them the entire time. My neighbor is working on getting a fence now that the spring is here, but even then I don't know if I will leave the dogs out alone. It was a minor encounter with violence, but it was enough to shake me up and change some habits.

Having experienced this far too many times (dogs jumping fences!) I now carry a few compressed air devices (“Pet Convincer” is a repurposed CO2 tire inflator that blasts air) to scare off-leash dogs away without hurting your dog accidentally via other less humane methods (pepper spray, tazer, etc).

Keep your dogs on a leash in public people!

Not quite as rough as you had it, but growing up with parents in the medical field, they could and would easily recount all the nasty injuries and deaths they had seen in accidents (or homicides).

Suffice to say I am firmly in favor of wearing safety equipment even for "simple" jobs, and trying to avoid pissing people off.