There I am, lying in my room, at about 1AM. I have my door open, light comes in from the hallway (I had a slight fear of the dark until recently). Everyone else is in bed.
I hear a banging sound. Logically, I figure that it's coming from outaide perhaps, I don't know, some drunkard banging on his front door. I try to ignore it.
Suddenly, it steps up a notch, getting louder and closer. I start to feel uneasy when I realise that it must be coming from inside the house. I wonder if perhaps one of my brothers is being stupid having woken up or something.
Another increase in noise. I realise it can't be either of them, I've heard no footsteps. The sound is clearly coming from the one room in the house where there's no chance anyone would be. The master bedroom.
Cautiously, I decide to step to my doorway and make sure my guess on the sound is entirely correct. As I do so, the sound gets even louder and even closer. Almost as if something is banging each closet door in that room, one at a time, gettign closer to the door (The room had a LOT of cupboards). Admittedly, at this point, I'm rigid with fear.
Suddenly, the loudest banging yet occurs, right next to the door. I want to run at this point, but hell, I can't. Far too scared. I know this room has to be empty. We avoid it like the plague, it's the room where my mother died, some 3 weeks before. It seems wrong to go in there. My brothers are both in their rooms and my father is asleep downstairs.
And as I watch the door, a final, hard bang can be heard. This time right on the door. I even observe the door shake. I utter a little scream and scurry back into my room, wherein I hide under the covers and sit there shuddering for almost an hour where my nerves finally calm enough to let me lie down and try to sleep.
I never worked out a logical explanation as to WHY it happened. All I know is it scared the shit out of me. Doesn't help that I've had stuff like this happen around me before, too. Once I could have sworn a hand grabbed my ankle while I was sitting happily in my room on the PC, and a red mark appeared there, too. And another time I was lying in bed at my grandads, while he was asleep...and the door to the room next to mine slip open of it's own accord. A heavy wooden door, so no chance of it being the wind. Never quite as terrifying as this, though.