This experience occurred in September '11, I was at my cousins wedding and after the service we went to this really old really beautiful grand building dating back to the Edwardian period. The evening was well on its way, the alcohol was flowing and the music was playing and people dancing.
After a while I started to overheat so I went to splash some water on my face. The door to the bathroom was located right next the front entrance. Due to the age of the building all the doors were these old heavy oak doors. I turned the handle and pushed but the door wouldn't open, I made sure the door was unlocked to which it was, so I pushed and pushed and just as I was about to give up the doors swung open and this sudden cold breeze passed through me like a knife cutting through butter and this feeling of fear and general horrid emotions.
As this happened I felt compelled to walk toward the front doors where I saw a few family members stood, my sisters face went from happiness to petrified, and let out a scream. I went out to her and asked her what she saw and she said she saw a little boy in old cloths, soaking wet, who walked out the bathroom, strait through me, out the front door and dissapear into thin air. My sister ran in doors to the rest of the party. As I'm a little more level headed about the paranormal I went round the hallways and was looking at all the documents that were on the wall telling the history of the building.
By what I found, the building was opened as a boarding school in the 1870s, the history before that is unknown. The 1890s there was a tragedy involving the headmaster and then a great fire, it was then restored in the 1920s and has been used as part of a school since. Was this great tragedy involving this little boy my sister saw, did the headmaster drown him, after all my sister said the boy was soaking.
That's about all the information I could find, so the details are unknown, although I have my theories.