Hello. I wanted to say something about spirits.
Many people would like to see, or somehow communicate with them. Some are scared of them, and wants them to get away.
Now before you think it's a spitit or entity, keep in mind it isn't necessarily one.
If you're wanting to meet one, the chance is quite big that it is just your own energy. As an example: I was looking at my aura, after trying to AP, so I had a strong connection with energy. I was watching my aura, when two pieces of paper (which were deep in my bookcase) flew out and fell down after. These things can happen.
An other option is it might be the fear. If you're scared, your aura is weak and open, giving lesser entities a sign, asnd an opportunity to get in. So even if your scared: keep your aura closed.
It could be a poltergeist too, but if what you experienced isn't like these, it could be an entity/spirit.