Then my eyes focused and I recognized what it was.
It was a goddamned spider who was slowly lowering itself from the ceiling right between me and the Cintiq.
So without panicking, I grabbed the TV remote, let the spider alight onto it, then lowered the remote to the ground. As the spider walked away, I proceeded to check the ceiling to make sure there aren't any more spiders want to check out what I'm working on. O_O;;