Spoiler'd for creepy crawly phobists:
This is honestly one of the creepiest pictures I've ever seen. As an attribution OCD sufferer I'll go ahead and let you know that I found it through an image search to this German forum, though I have no idea where it originated.
UPDATE: Thanks for your spider pictures and nightmare fuel, everybody. I think there's probably something inherent to spiders that makes us fear them even more than we should - sort of the fear equivalent to the Golden Ratio. After all, spiders exist both in big and small, poisonous and benign forms, just like snakes, but I'd wager far fewer people fear snakes the way we hate spiders.