White boy/Bouncing Light

When I was about 16 I was hanging around with a few of my friends, getting up to no good like most teenagers, one evening we decided to go climb an old furnace chimney at a local school, we climbed to the top of this chimney and drop a few bricks down it, some of these bricks hit the bottom with a thud but some didn't, I have no idea what happened to these bricks maybe they caught on an obstruction or something, anyway this scared us a little, we climbed down and I stood with my back to a door which allowed you access to the chimney, whilst resting here suddenly there were three loud bangs from behind the door (same number of bricks that had not made any sound), I can tell you we ran like hell out of there, after running for what seemed like ages, we realized that we were almost home, at the bottom of my road there is another school call st Thomas of willingale, whilst looking over at the darkened school I noticed a strange light bobbing up and down one of the corridors, it looked like someone was carrying a torch, lantern or something that created a light, I pointed this light out to my friends but none of them could see it (they thought I was trying to wind them up after what had just happened at the other school), I tried and tried to point it out but they still could not see it, suddenly this light reached the end of the corridor but it carried on has if there was no end there, it seemed to be heading in our direction, one of my friends let out a little yell that someone had just pushed him!, enough was enough we all ran off to our respective homes, as I got to mine my mother was standing outside my house and saw me approaching, without looking at me, she asked how my friends were and this was her exact words that she said next "Who was the young boy dressed in white carrying the torch with you lot, I've not seen him before". I ran straight in up my stairs and dived under the protection of my duvet. I have had countless others, Can I see ghosts? You tell me