You can overdose and die from coffee.

You can overdose and die from coffee. There is such a thing as a lethal dose of caffeine. Medical literature contains reports of people dying from ingesting large amounts of caffeine, often through unconventional means, such as injecting caffeine straight into the bloodstream or having a coffee enema (literally putting coffee in your butt!). It takes ten grams of caffeine in one sitting to kill a person, which would literally take between 80 and 100 cups of coffee, which is pretty hard to do. If you want to know how many cups of coffee will kill you, check out this calculator. (source) - OMG Facts - Your Mind. Blown.