I was in my bed. All of a sudden I felt like a physical presence covering my body - some parts in depth. Then the bed started shaking. I felt hot.
Must have been ghosts. Must have. I mean, that's the only *rational* explanation for stuff we don't have an immediate answer for. There aren't natural phenomena that I am unaware of.
It could have been my girlfriend at the time too.

. She was her very own natural phenomenom. Still is.