When you hear them stop screaming they are ready!!!
Seriously though put about 2 inches of beer in the bottom of a pot, some butter and a little OLD Bay. Turn it up hot and drop them clawed wonders right in. Keep the lid on but leave room for some air to puff out. Once the water starts boiling and they are starting to steam the shell turns bright red cook for about 2 minutes after that and they will be ready. DONT OVER COOK...Shoe leather tastes like sh*t.