Spider... ick

I noticed a spider hanging from the ceiling fixture in here a few minutes ago. Our "official" policy is that spiders on the ceiling can stay there unmolested, but if they come down off the ceiling, they forfeit that privilege. So I tried to reach up and grab it down with something, gingerly... I'm not really good at that, it's usually sdavido's job, but he's still at the conference. (Coming home tomorrow - yay!) Unfortunately I must have misjudged, and instead of grabbing it, I wound up just knocking it down. So now there's a spider in here somewhere, and I can't find it. I keep looking around but I haven't been able to spot it anywhere. I'm just hoping it doesn't suddenly appear crawling across my monitor or something. Ick.