So to start off, I want to point out this experience didn't happen to me but happened to my mum now I can't quite remember when it was, but I know that it was at least 2 years ago.
It was a late night sometime in the week, around Wednesday, Thursday and when this account happened it freaked me out to the point of crying. Ok, and let's get something straight, I hardly ever cry especially over something like this.
At the back of the pub (that was were we were when this happened) there is this alarm and the alarm works so if something is opened it will give us what it is and where. For example: hall, window. The pub was cleared out and everybody had left. Just before we were about to leave, the door we were sat in front of opened as wide as it could go, bearing in mind this is a VERY heavy door and there was no way the wind blew it open. There was no hand and my mum's friend checked the alarm and it said "bar, window, door" but when we looked nothing was there.
Basically I was so freaked out that we called the police to check the security footage and to search the entire building but they found nothing. If you have read my other story you know I don't have big experiences with the paranormal and even though this wasn't me, I still think it is the scariest and creepiest thing ever happened.
My mum and her friend does not believe in ghosts and I respect that but even my mum doesn't have a explanation and she always seems to have a explanation or a solution but this stumped me, her, and her friend.
Please give me some suggestions on what it could be. That would be a massive help but please, not it was the wind. The door is too heavy to be opened by the wind and it wasn't even windy so...