How are you in an emergency?

I've potentially saved the lives of three people so far. I say potentially because I can't be certain it was fatal or that someone else might not have turned up.
I always thought of myself as irresponsible. And I never thought of myself as particularly reliable. Despite working hard I'm still quite rudderless in my own life. The weird thing is that if you put me in a situation that requires immediate action I tend to keep my head and think rationally.
The most recent occasion was leaving home about a year ago. I saw an old guy sleeping on the ground across the road. As I got closer I saw that his trousers were around his ankles. So I went over and saw the back of his head was red. In the middle of the day he was drunk, went up to a gate to pee, fell and hit his head on a bit of metal. There was about a pint of blood on the ground. So I called an ambulance, woke him up, kept him talking whilst using my hoodie to stem the blood. The hoodie was drenched by the time the ambulance arrived.
The same thing happened in work. My last job was managing critical technical incidents. I found that whenever anything went wrong and everyone was freaking out I stayed calm and managed the situation. Within a few months of joining the team I was leading most incidents. I never would have imagined myself being that guy.

I was on a train and there was 2 little girls running up and down playing around. I wasn't paying much attention but I heard a strange noise and turned around, one of them had somehow wound a luggage strap around her neck and was slowly being strangled. I ran over to get it off but it was lodged into her throat. She was petrified and I realised that I would need to cut it off, I ran through the carriages shouting for a scissors or a knife and was banging on the driver door, he wouldn't answer because as he told me afterwards he thought it was "just kids playing" .... I went back to the little girl and lifted her up slightly so there wasn't so much pressure on her neck shouting for someone to help. After a few minutes a guy comes along with a little nail scissors and we managed to cut the thing off.

The whole time the girls grandmother was sitting and staring at us, she did nothing to help and she never said anything afterwards until she was getting off the train ready to give the Iarnrod Eireann staff a mouthful. I know she was probably in shock but I was so angry with her at the time.