My grandmother lives in Horsham, and I had an experience a while back which I'd always chalked up to the ghost of her (then-recently) deceased husband. I was quite young, about 8, and I was already a budding Fortean. Very into ghosts, cryptozoology and Scooby Doo. Like, 5-year-old me used to have conversations with my parents about the origins of the Jersey Devil.
The experience happened while I was out playing in the back garden of this little house on Heron Way, and I was quite spooked already because I was aware that my grandpa who lived in the house had died quite recently, and so I was almost expecting something to happen. Whatever it was, it was very quick. I turned around (don't know why - perhaps due to a breeze or a sudden silence, I must have had a reason...) and I saw a weird, fleshy, almost-skeletal figure. It had grinding teeth and bulging white eyes in a frozen facial expression, and flesh looking like a clay model painted to look like a white man. That is, a weird peach colour. Its flesh was uneven in a way, I could see it had raised veins on its neck and things. It had a light green shirt on. This creature seemingly moved past me very quickly, because I don't quite remember how it left the scene. I turned around and it was there for a moment, and then it was gone. I ran back inside, obviously - and the experience has stuck with me ever since. Every time I visit that house, I always remember that thing's face and general grotesque appearance.
To be honest, I am not convinced that I saw the ghost of my grandpa. It was far too Scooby Doo. Far too stereotypically 'evil' and 'scary', and I think that if my grandpa really was going to come back, it wouldn't be me that he would appear to - he didn't really like me much, and we didn't have much of a relationship. I can't decide if I should just file this one away as something I imagined, because the memory almost seems to be fading as I write this, or if I should consider if I may have momentarily created a thought-form out of my expectation to see a ghost.
I'm normally a skeptic, but there are some experiences which I've personally had, and read about, and been told about by my friends, which have led me to the conclusion that a considerable portion of Forteana might hold more weight than I had previously thought. UFOs, for one, and I'm currently just coming to terms with the idea of ghosts and life after death.
That's a sentence I never thought I would say...