Coffee and Caffeine FAQ

I recently saw a poster for a company's coffee of the month, "Voltaire's Blend". Supposedly he drank 50 cups a day. If I were to try such a thing, spacing the cups out evenly through out the day, what would happen to me? I am considering it, just to see if it's possible. I normally drink between 3-9 cups per day of black coffee, which no longer gives me any kind of boost. I just want to make sure it isn't extremely dangerous. Slightly dangerous is okay.