" I had heard that Presley died on the toilet, but I’d assumed the location was happenstance, as it was with Judy Garland and Lenny Bruce: an embarrassing setting for a standard celebrity overdose. But the straining-at-stool theory made some sense. With all three autopsies—that of J.W., Mr. K., and E., as Presley’s intimates called him—the collapse was abrupt and the autopsy revealed no obvious cause of death. (Though Presley had traces of several prescription drugs in his blood, none was present at a lethal level.) What Elvis’s autopsy did unambiguously reveal was a colon two to three times normal size. "

― Mary Roach , Gulp: Adventures on the Alimentary Canal