Found this on 4chan, a tasty stack of McHamburgers. I'm dying to find out if this was a one sitting kinda challenge.... so if you know where it's from, drop a message in the comments!
From: http://www.4chan.org/
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SupersizedMeals.com
http://www.supersizedmeals.com/food/article.php/20070905-McHamburger_Stack