What is a ghost?
..a terrible event condemned to repeat itself over and over again.
A paintful instant, perhaps, something dead already that for a moment looks yet alive.
A feeling suspended in the time..
like a blurry photography,
like an insect trapped in amber.
I was watching The devil's backbone by Guillermo del Toro.. and I get inspired by this phrase in the beginning of the movie.
If you still hadn't watch it, you should.