I was at a birthday party for a friend's kid. Lots of people I didn't know there. I was having a few beers when I noticed one kid about 8 was holding another kid about 3 under water in the pool. I got a running start and cleared about half the pool as I jumped in. I grabbed the kid who was under water and blue and threw him on to the edge of the pool. When his back hit the ground, water shot from his mouth, he started breathing again and his normal color returned. I turned around to yell at the other kid and saw blood everywhere. Evidently (TM), my elbow caught the little shit in the face. His parents acted like I owed the attempted murderer an apology. He received none and I was never invited back. The blue kid's parents were grateful though.
I was working in a mill once which had its own generator which produced 230kv. I watch a guy get to close to the field. When I tried to yell at him he caught an arch from about 8 ft away from the wires. Another guy and I used CPR for about 5 min until the mill medic arrived. He was throughly cooked, but returned to work about a year later with a limp.
A neighbor once fell off his tractor and the implement ran over his leg and almost removed it. I wrapped his leg in a towel and called for help. I was the only person around for miles. If I wouldn't have noticed a driverless tractor running across my fence he would have died.