I guess my scariest experience was getting raped at knife-point by two men when I was a teenager. Afterwards (at maybe 6 AM) they were taking me with them but luckily a car came up the road and I ran in front of it, thinking the driver would jump out and save me, but he just swerved around me and kept going. But I guess the men had thought the same thing because they ran across the road towards their car and I turned and ran up the sidewalk to a hotel, then I hid in the bathroom for a long time, afraid they would come after me (I was a particularly clueless teenager I guess). When I came out I was still afraid to go back home so I went in the hotel restaurant and ordered chocolate milk and buckwheat pancakes. When they were served I discovered that after getting punched in the stomach, a person's stomach doesn't let them eat, so I proceeded to slowly shred the pancakes into a large heap of crumbs. The waitress was very nice and offered to bring me something else if I didn't like my food, ha!
I never told my parents. It took me maybe 5 years to get over it emotionally.
Now its about 50 years later and it wasn't even the first thing I thought of when trying to think if anything scary ever happened to me.
The experience that first occurred to me wasn't even all that scary (for me), just a soldier almost pointed a gun at me. I was hitchhiking in the West Bank and got a ride with an electric meter reader who told me that he wasn't going far but there would be a major intersection (which turned out to have a military checkpoint) a little ways farther down the road. So I was dropped off out in the middle of nowhere with no homes or traffic around. I had a suitcase that had wheels, but one wheel was damaged. So I went down the road alone pulling my suitcase and it was making a gosh awful racket as it rolled. The road curved around a huge boulder that blocked any view ahead. When I came around the boulder there was a soldier standing in the middle of the road waiting for the mysterious noisy thing, and although he did not have his rifle pointed at me, it was chillingly obvious he was ready to point and shoot if I'd turned out to be a danger. It was quite startling but he turned out to be a perfectly nice young man probably about the same age as me. I think he had been the real one having a scary experience!