As a sixteen year old on the southern coast of Guatemala I saw 'my ghost'.

A cattle ranch far from civilization. Would need ten pages to tell it adequately. But one night a fluorescent egg shaped orb as tall as a human floated into my room. It hovered above the floor, I could see it move as it stood in place, very real. Hair stood up on the back of my neck but I stayed calm.

As though we were both looking at each other for several minutes. The orb then drifted toward my huge window and seeped through to the outside and was gone.

Nothing on this planet will ever talk me out of having seen a real ghost.

For what its worth: There was no electricity after ten pm when we'd shut down the generator.

Ghosts, do exist.