Well i mean have you ever thought you might get chocked.... It's Not How Much You Drink, It's How Fast You Drink It! Also The kidneys of a healthy adult can process fifteen liters of water a day! You are unlikely to suffer from water intoxication, even if you drink a lot of water, as long as you drink over time as opposed to intaking an enormous volume at one time. As a general guideline, most adults need about three quarts of fluid each day. Much of that water comes from food, so 8-12 eight ounce glasses a day is a common recommended intake. You may need more water if the weather is very warm or very dry, if you are exercising, or if you are taking certain medications. The bottom line is this: it's possible to drink too much water, but unless you are running a marathon or an infant, water intoxication is a very uncommon condition. ??? ;-) learn more at.. morhttp://chemistry.about.com/cs/5/f/blwaterintox.htme
There are 2 possibilities either you will vomit (to much water to fast) or you can have your brain swell and expand to the point that you die (WAY to much water at once, not necessarily fast just at once, and is EXTREMLY RARE, like a 1 in a 500 million chance.