A childhood belief about ghosts

I was very fascinated with ghosts when I was little. When I was about 5 or 6, my family was at my gran's place who lived in an old house which my sister and I used to find pretty scary. Esp. the first floor were we used to sleep. It was dark and full of strange cupboards and attics.
My sister and I were sent upstairs and my little sis fell fast asleep. But I just lay there, not tired at all.
All the grownups were still downstairs, having a good time and I felt lonely and left out.
And suddenly this thought came to my mind of how a skeleton would be climbing up the stairs and entering the room. I couldn't stop this thought, I couldn't get it out of my head, instead it grew all the more intense.
I managed to call for my sister, but she wouldn't wake up. I was really beginning to panic, I broke into cold sweat, because I FELT that skeleton come nearer. And I couldn't even go down to the grown-ups, because on the way down, I would, of course, have to pass the skeleton.
Don't get me wrong, part of me KNEW that there wasn't a skeleton, but that part didn't count at that moment.
Next I began to scream and cry, till I was hoarse, but nobody downstairs would hear me. It was as if I was all alone in the world, as if there was noone left but me.
After an eternity I managed to get up, chase down the stairs with half-closed eyes and run into the safety of the warm, light living-room.
For someone who hasn't experienced a similar thing, all this might seem pretty silly, but when I think of that night, I can even today still FEEL the fear I felt then.