(February 17, 2012 at 2:32 pm)Ziploc Surprise Wrote: Why are ghosts depicted with sheets over their heads?
Maybe simply to hide the fact that they are not actually ghosts, but humans with a face, body, and everything else.

Now, this is old, but here's a "Jinn" video:
If you pause the video at 3:20, you should see some kind of a transparent/glowing face of a person in the background.
And funnily, some Muslims (but not me) believe that this is an evidence for the existence of Jinn.