Heh, I don't know. I have this blood alcohol calculator thingy but it doesn't tell me about hangovers, only immediate effects. If he has ten drinks over a period of three hours his blood alcohol level will be .16 and he'll be woozy, feel like throwing up, and will be struggling to pay attention to the road while driving. If he has six drinks in one hour his blood alcohol level will be at .11 and he'll be over the legal limit and might feel tipsy, and swagger, and his speech might be slurred, etc.