I just watched an episode of Man vs Food from 2010. I think the reason this one was special was that the challenge included pretty much primal foods.
The challenge: Eat 4.5 pounds of steak (various cuts) and 1 pound of sides (creamed spinach and mashed potatoes) for a total of 5.5 pounds of food in one hour.
Could you do it?
Note: The show's host ate all but 3 oz of steak in the hour.