Haunted? Paranormal?

This is a story from when I was in the lower grades of elementary school. There's a place called Gotenyama next to the elementary school. Since it was technically a mountain, the rule was that we could only play there during lunch break when a teacher was present. There was a large open space at the top with playground equipment. Next to the open space, there was a path shaped like a '凸' that overlooked the area from above. The other side was just a path. The '凸' part was about 3 meters high towards the open space, and the path on the opposite side was about 4 meters high, with a pretty steep slope of about 60-70 degrees. As an adult now, it's probably possible to run down it. To a child, it looked like a cliff that wasn't not high. Towards the end of lunch break, the boys were playing a game of running down it, like a dare. I, who always played with the boys, decided to try it too. I went up to the path at the top, but when I looked down, I got scared and was about to give up when... Someone pushed me from behind, saying "Die, [Last Name] ▲▲," and shoved me down the slope. I didn't fall all the way down and stopped midway, but I was in a situation where it was too difficult to climb back up and too scary to slide down. I somehow managed to climb back up and returned to the classroom just before the afternoon classes started, having spent the entire lunch break climbing the slope.