Big in Oklahoma

Chris came across this tarantula while walking the wilds of Oklahoma. I knew that state has some big weather systems, but I didn't know it has some big arachnids too. The blue tint isn't from the l.e.d. flashlight Chris was using. No, it is the evil radiating from the spider.

Any of you spider lovers care to ID this critter for us?

Thanks for the photo, Chris from Oklahoma City.