We have an animated ghost that makes an appearance in the second floor window, and another that makes an appearance on the first floor window. We also have a circle of ghosts that surround a pyramid of skulls on fire. I'm sure there are also ghosts that we can't see.
Very first ghost test
First test of additional ghost effect
This test was to see what the ghost effect would look like in such a large window so close to the ground at night.
Flaming pyramid of skulls test
Skulls n Ghosts