I have a few strange stories -
Firstly seemed to be a curse at our school .Every two years a student would die. 
First a boy hung himself, two years later a boy drowned in the pool, then it was ‘my’ year and we all were hysterical about ‘who’ it was going to be. A girl had anorexia so a few kids had their ‘bets’ it was her. (Kids are harsh like that) but actually a friend of mine died in a drunk driver car crash. It was awful.
(A few years later a girl threw herself onto the local train tracks but I’d left by then.)
Lots of us that had been friends with the girl who died in the crash got interested in the occult, and we did a ouija board at my boyfriends house. His neighbours had also been killed in the crash! Strange coincidence.
Nothing much happened other than feeling an awful feeling of doom, I realise now it was some sort of panic attack, probably brought on by the high emotion and darkness of it all. A couple of girls started crying, and even the boys looked shaken up. A few of us were going to stay over at the bfs house, so we put on a film and had a few of us in sleeping bags etc all over the room.
Then the lights all went out, scaring us half to DEATH. Eventually managed to get the lights back on, but all of us were horribly nervous. Lights on, we settled down again.
An hour or so later, someone started banging on the front windows of the house, all of us screamed again, the dog is barking, I dived for the lights (so we could see out but no one would see in) and we tried to see who it was. No one there.
Cue lots of ‘this isn’t funny’ etc. We are all whispering and listening out. The banging starts again. My bf throws open the curtains to see who it is - no one is there! No one on the street of anything.
As he throws the curtains open, the banging begins on the back windows of the house.
Obviously being teenagers we are all screaming/laughing and crying. But there wasn’t an explanation for it - the house was a terrace house, no access to the back garden, and certainly not so quickly!
Anyway, I’ll wrap it up. We settle down again, in our sleeping bags, huddled together, dog on our laps. but I have this awful feeling of dread again. I whisper to my bf and best friend ‘bad luck comes in threes’
Minutes later, his dog starts having a seizure, teeth bared, eyes rolling back, all joints stiff and shaking. It was a horrific sight. None of us know what to do, my boyfriend tries to ring his mother (who was out on the razz) but there’s no signal. It was before we had ‘internet’ phones...
His dog had a few more seizures that night, we took him to the vets the next morning and he had to be PTS. It was an awful end to an awful night, never did I mess with any occult stuff ever again!