It's easy to see how/why first responders are so prone to PTSD and burn out. I have not yet had to deal with a self-injury or really tragic scenario. A lot of folks would consider the accident I found to be really tragic and horrific and all that, but I simply don't. They were very drunk, they were driving, they had a habit of driving really fast on a gravel road in a front wheel drive car. They were literally handing their lives over to fate and consequence. It is sad for the friends and family that were left behind, and depending on how much the survivor remembers, possibly rather haunting memories.
But for me, I remember every detail, and I am comfortable with the fact that I knew immediately that there was no helping the driver. He did have a fading "heartbeat", but the body does not last long with the brain partially on the outside. And I know dead eyes when I see them.
If they had caused injury to someone else, hit another car or the like, the story would be different.