I am 15 years old. When this happened I was 13 and living in a huge old house that belonged to my Nan.

I was cleaning my bedroom and was crouching down beside my bed to clean underneath it. As I reached under there came three sharp knocks on my bedroom door, which was closed at the time.

Thinking it was my idiot little brother, who was 11, I got up and opened the door ready to yell at him to go away and stop pranking me. But when I opened it there was no one there.

I was confused for a minute but then realised he'd probably darted back into his room or into the the bathroom so i yelled really loudly "GUY!!!!!!!"

Instead, my mom answered screaming at me to shut the hell up 'coz Guy was in the kitchen. There was no way he could have got down there in the thirty secs it took me to get to my door and open it. So I shook my head and went back in my room to finish cleaning.

As I crouched down to finish cleaning under my bed three sharp, violent knocks came again at my bedroom door. I looked up sharply and hovering right at the end of my bed was a white misty looking thing.

I fell over backwards and when I looked up it had vanished. I only looked away when I fell for about ten seconds so it had no time to go out of the window or door. Anyway, both of these were locked.

It couldn't have been any water vapour or heat hazes from the radiator either because the radiator wasn't on. My room wasn't warm, it was freezing cold and I was wearing a sweatshirt.

I don't know what it was but I found out three hours later that my Great Aunt Margaret had died that day and before she died she had wanted to speak to my Nan. Coincidence?