Sometimes we hear, see or experiment something that is not normal. We try to find a rational explication, but can't find one. Maybe was the wind blowing, maybe was the of house pipes, maybe were my child playing during late hours or my dogs barking. Sometimes is not ourselves the ones one live those experiences. Maybe you know someone who had this kind of encounters. I personally haven't this kind of experiences, but there's a lot of people out there that say yes, and explain their stories. Sometimes not all scary, there are ones that are even tender and caring. Not all spirits are bad. I mean, If your beloved grandfathers presence in the room, doesn't make sense he wanted to kill you, maybe he's there only to say hi.
Do you believe in paranormal activity? Do you think that there's people with special sensibility for it? Do you think that is related to religion or fantasy, or something between?