Just completed a wings challenge from this joint:
http://www.reddogsaloon.co.uk/menus/..._menu_food.pdf
Six wings, apparently over a million scoville.
Beyond the obvious (mouth on fire, eyes watering,) I also ended up with a very elevated heart rate, tingling fingers, and a light head. Basically, it confuses your body and you get flooded with endorphins. Coooooooooool.