Ghost story of our school xD.

So, we had a class party today, where we mostly ate xD. We ate about for a hour and then started playing games. First was 'Fear Factor', which was disgusting, since a person vomited. Then we started playing hide-and-seek all over the school. The first time I was found quite quickly, and so was Mari xD. Then, some of our calss boys couldn't be found, so we went searching for them. We looked downstairs of the ground floor (it was like a basement or something xD), and when you went to the deepest point where there were no stairs anymore, ther were three doors there. We knocked on the door thinking that the boys, who were missing were there, but nothing. Most people left, and so did I. Then afterwards, when the boys were found we heard a shout from the basement floor thingy place. The girls, who were there (Mari was there too xD) kept knocking on the door and they heard a knock coming from the door. So one of the girls screamed. When they came up they didn't know yet, that the boys were already found, so I told them. After we went for another round of hide-and-seek. Since they told me about the knock we went to hide there. We knocked and knocked, until there came like a sound of rasp. Someone turned off the light, when we were running away being scared, so it made it even more creepy. I fell trying to run up the stairs and scrathed my knee a little. Then, when we were all up, we found out that all of us had actually heard that sound and it was kinda creepy o.o
We still have no idea what made those sound behind the door. We will go there on Monday though, so if anything happens, I'll probably write about it here xD.
Hope it's something logical and not a ghost xD.