Shit happens. Since this page is called Hot Poop, why not post some shit-related links every once in a while.
This page suggests that somewhere between 40 to 67 pounds of fecal matter was apparently found lodged in the respective colons of John Wayne and Elvis, at the time of their deaths. Now since man genererally consists of 75% water, this would lead to the conclusion that both these american icons were composed out of not a lot more than water and shit! The page also has instructions on a kit to build your own John Wayne/Elvis Presley.
But fair is fair… you might also consider the Snope’s take on it…
(thanks to eff for the links)