Orbs.

Ghosts or Dust?

What are your opinions on orbs?

Have you ever seen an orb without a camera?

Have you ever caught an orb on video?

If you don't think they are the pre-manifestation of a ghost, what are they or what could they be?

I'll give you my own opinion later on.

I believe orbs are just refractions in light that a camera catchs. Now as for seeing orbs in person as they flash across you for that split second, I believe can be a spirit. I have heard of occasions where that has happened during an investigation but as it is limited to photos, just a wrong capture of light. Given I've taken several pictures that end up having orbs in them and as far as I know, my house is not haunted or has a ghost.