The plot thickens: a commenter here posted this link, which indicates Ötzi might have been roped in to this story in quite an imaginative way:

"Despite this new evidence, curiously in 2008 the impact hypothesis was revived by some pseudoscientists in connection to supposed observations of a meteorite by the Sumerians or to explain the death of the Iceman as a human sacrifice to prevent a nuclear winter after the impact."

http://historyofgeology.fieldofscience.com/2011/04/landslide...

Unfortunately the sciforums link to discussion of the pseudoscientists is dead