hmm when I got my jaw shattered I kinda wasn't given a choice but to drink my blood it was that or drown on it. I bled out in the region of 2 - 3 pints of blood and swallowed atleast half of that, it doesn't taste too bad but after a pint or so of it you start to feel a bit icky it isn't meant to be drunk after all. Also little known fact that blood consumed by humans is dead when ingested. Infact it is dead before it leaves the mouth as there is a chemical in saliva that kills the cells off almost immediately and the blood turns brown in colour.