The reason you feel a "hangover" is because the body is severely dehydrated, therefor by drinking gatorade, which hydrates you (why do you think athletes drink it?) and McDonalds (the grease helps absorb the leftover alcohol that hasn't been processed) or something similar is the quickest and easiest way. Keep in mind, it may be difficult to down the egg mcmuffin if you're feeling quite sick, but like I said just give it 15 minutes or so.