AzuPazu, I have to agree with you there, I try and choose not to believe in the supernatural, because, same as you, it is one of my biggest fears. But there have been cases where... there isn't any other option.
1. In my last middle school (I went to two.) class had already gotten out and I had stayed behind to go to the Boys & Girls Club, and I was walking alone to one of the exits when I saw a weird flicker off to my right. I look... nothing. I swear it looking like a person, but was never sure. That isn't the reason I am certain though. I continue walking, and suddenly a poster flies at me from... you guessed it. From My Right. A poster which had been TACKED to the wall, in a corridor WITH NO BREEZE to speak of. I RAN LIKE HELL.
2. Here in my current high school, I was leaving the B&G Club yet again, different school it is a massive club, and it was probably 7:50-8:20PM, I was walking alone in the open air corridors (Or Courtyards, even though I only count one of them even being like that) when from nowhere a box flies out of the trash bin and lands at my feet. Unlike last time, I went to check it out. No janitor. No strings. No fan. NOTHING.
And although I am somewhat skeptical, apparently my gym I have gym class in... it's haunted. The only reason my class even knows is because I noticed the door opening and closing. I ignore it for a while, but it keeps going, so in the middle of the class, I jump up and quickly jog to the door to find the prankster. Nobody. I stand around, confused as hell, my teacher is asking/yelling why did I get out of my seat (We were discussing... habits passed down through our genes, I think. That's why we were sitting in gym class.) and I tell her, "The door keeps flying open." Her response freak the hell out of me. In the most calm and nonchalant voice, she says "Oh, it's just the ghosts, ignore it." Now, you may be wondering, what was so odd about a door moving. Have you ever seen an object on hinges, and thought "I wouldn't be able to carry that myself." Yeah. That's the door, we still have those heavy as hell doors in my school, the things that weak people are unable to even push open.
All of these still freak me the hell out.
@Sgt. Dustmop - My friend has had a similar experience himself. But a few differences.
A. He told his grandmother this.
B. He was talking about two little girls.
C. The house they live in... they obtained the plot of land, after his grandmother's friends' parents moved... since their little girls died.
His grandmother thought he was just spinning a story, until he described them and in scary detail.