I don't exactly believe in Ghosts but i have had a couple of experiances that i couldn't explain.
Both witnessed so it's not like i was self deluding or anything like that.
The first was when i was about 14 or 15 walking with my best frind back to his house from school, we walked past some random guy as we took a short cut (same one we had taken for the previous 2 years since it was the same route back from school.) all of a sudden i had the feeling of pure and undiluted evil.
I mean the hairs on the back of my neck stood up on end and i felt an almost physical blow, it would appear that both of us did because we both shouted
NO!! at the same time and took off like startled Gazelles, either that dude was seriously wrong in some way or he thought WE where a pair of nutters, happily i was and am faster over the ground than my mate so he would have found out first
Never could explain how i knew there was something wrong with that guy and i doubt i ever will, but if that story ever gets mentioned we both go rather quiet and try to change topics.
The second time was when i was 23 and i was staying at the same guys house for xmas since i was on leave from the Navy and i had nowhere to stay since my parents had run off to the sun rather than face another cold English Winter.
We had a couple of beers, and talked sh*t as people do when they stay in the same room after no seeing each other for months, i woke up at 3:15 to see a figure bending over me from the window side of the room, (i was lying on a inflatable bed on the foor) i could in the instant i was aware of it that it was clearly a figure with the siloette marked against the moonlight behind it.
I took a swing at it and hit nothing, so i the really put my shoulder into the second one (by this time fully awake) and hit the wall behind where the shape was, this worrieds my somewhat and i scambled way from what ever it was waking my friend who said and i quote "What the **** is that!" he then hit the sidelamp to reveal an empty room and a deshevilled looking Sailor!
Ghost? who knows i doubt it, but i can't explain it rationally, but then i can't explain why people believe Jesus was the "son of God" rationally either so it doesn't say much does it.