Very large hand prints like the picture below are found in many homes and believed to be spirit made.

Ghostly Examples (Page 2)

PHOENIX ARIZONA PARANORMAL SOCIETY (PAPS)

This photo is a image of what we believe to be a demonic entity in the middle of an apartment.

The next photo is what people refer to as an orb. An orb must change direction, be accompanied by smell or sound, and seem to be under intelligent control.