My scariest moment was when it was my brothers birthday last year. My family and I decided to take public transport to the local Zoo, as we were on the Tram(smaller version of a train, which runs on main roads), we were approaching busy stop, were many people get on the tram, as the tram stopped, the doors open, holding out a sign with a drawing of a red hand which says "STOP!" - directed at the cars on the side of the tram, meaning that people are coming on and off the tram. Me and my family were sitting pretty much at the back of the tram, as we saw a tall man get up out of his seat and walks off the Tram. Right that moment when he put his two feet on the ground outside the tram doors, I saw a car Zoom past the back doors of the tram, that split second I knew what was going to happen to that man, he got hit by the car, and went flying in the air 5-10 meters past the tram and then again was ran-over by the same car.
I really didn't want to look, but the urge of my curiosity made me peak out of the window on the tram, to find a half-severed knee, two meters away from the man, my 6-year-old brother had no Idea what was happening, I didn't want him to see what had happened either, you guys can pretty much predict the rest.
I now this doesn't really relate to myself being scared, but seeing a guy flung into the air and then ran over by a car - not to mention the severed knee, was F*cking scary at the time.