What kind of spider is this thing?

http://funnyjunk.com/funny_pictures/1973706/What+is+this/ Found that browsing on FunnyJunk, and I need to know what it is now that I've seen it! XD The thing's back entrance looks like a DOORKNOB D: I just need to know because it'll kill me otherwise wondering what it could've been XD Any help is appreciated; DOESN'T IT LOOK /COOL/?? ..is it deadly?