There is a pub in Sheffield called the Frog & Parrot, apparently there used to be a real parrot there (though not a frog). But more importantly, they used to serve the world's strongest beer clocking in at 16.9% ABV (according to Guinness book of records - I'm sure I've heard of stronger). It was only sold in 1/3 pint servings to avoid problems, but certificates were given out to successful drinkers who presumably didn't pass out.