Long story. But basically I took a few of my friend's friends out on rented snowmobiles at night and we all shared a bottle of jägermeister. My friend was a 30 year old mother of two with a husband in jail for violating a restraining order she had on him. Her two friend had recently had a threesome with her. (I chose not to have sex with her months before despite her throwing herself at my 18 yo self). This resulted in them getting into an argument, and I decided we should all leave. On the way back, mistakes were made (the two stopped suddenly in the middle of the trail to argue and I overcorrected to avoid them) and she fell off and hit her head. The two dicks sped off leaving me alone in the woods with an unconscious woman, who's brain resorted to animalistic screams and flailing arms, holding her head/neck at an angle so she didn't stop breathing. Some time later we were found, then the cops and paramedics arrived. I was sober by then, so didn't go to jail. But she got life flighted half a state away and spent a month in the hospital.

I sort of changed my life after this. I don't really think of this as the moment it all changed. Rather it is other events (finding a belief in God and wanting to become a better person as a result) that precipitated those changes. But truth be told, I probably would have continued to go downhill if not for this incident. Typing that all out made me realize just how messed up my life was back then.