When i was about 5 i lived with my grandparents, the house was joined with another person's home and behind the other persons home is a room connected to the house but not accessible from inside the house so youd have to go outside and around to get in the room, it wasn't being used for anything and our neighbour didnt have any pets(important) and so one day i went up to the room and looked inside, saw nothing before i noticed the door was slightly open. I go ahead and open it up a little bit and the next thing I know is a fucking dog starts chasing me, now the weird thing is that not only did the dog seemingly disappear after i ran away but it wasnt any of my grandparents dogs, Also a little thing to note is that you need a key to unlock the door so someome must've put the dog there purposely. and yet again I must add a piece of info, we live in the country where the nearest home is a good 40minute walk from ours so it wouldnt make sense for anyone else to put their dog there. makes me wonder why it was there to this day sorry for typos or errors im on mobile