Just like FireIce's reply, perhaps it was just the door closing
shadow.
Otherwise, most likely it was yer eyes playing trick on you.
Check this out, I, too encountered similar thing. While sitting in
my home's toilet, it seemed like somebody was moving outside the
door. But after I observed it, it was actually when I moved my head
to different angle, the light reflection seemed to move as
well.
No big deal, just don't scare yerself. Do you believe in yer
religion anyway?
Cheers
