I'm going out on a limb and saying 30 pounds of food in one sitting is an impossibility. I assume the owner of this restaurant will have barf bags ready for anybody who tries, as this will be the end result.
I remember reading some years back of a woman who did rupture her stomach as a result of eating some 18 pounds of food. I don’t have the book any more, so can’t provide a reference.
I agree that most people would not be able to do such a thing.