That is one urban legend I cherish and spread at every opportunity.
They say that the doctors tasked with cutting open Marion Morrison's bloated corpse were so affected by the noxious, rancid fumes seeping out of his feces-packed colon that they vomited 3 full gallons of steaming bile right onto that dead bastard's purple face. True story.
Off the scale for a normal man, but this is JOHN WAYNE we're talking about. I bet he could take 20 POUNDS if impacted fecal matter, you pathetic little girl!