My first paranormal experience

My first paranormal experience happened when I was a senior in high school. I was one of those students that likes to be tardy to class. You know-- one of those hall walkers. One particular day, the bell had long rang and I was moving along slowly. I took a case of stairs near the front of the school because I knew that know one would see me roaming the halls. Well, as I was running up the stairs (not full speed-like a jog) I could hear someone running running heavily down the hall. I didn't pay to much attention to it ,but as I made it up to last step-- whatever was running met me at the same time. I didn't see anyone ,but it felt like something had ran through me. I grabbed the rail because I was about to fall backwards from the impact. I had a strange feeling after that. I said to myself....did I just die? I felt really light as if my feet was not touching the floor -- as if I was floating. I felt that way for hours. It still haunts me to this day. I wont ever run up stairs again nor will I use stairs if I am the only on around because of that incident. ...after that horror , I still skipped classes lol