I really don't understand any of these food eating competitions, or why anyone would try to eat a 15 Lb burger. We have something like this in Portland, where the challenge is to eat ten-pound steak or similar.
The two things that have most surprised me in the US are the size of the meals served in West Des Moines Iowa, and the sweet tea drank in the south. Though in the deep south, I once had some bacon that was I think about 90% fat. I took a bite before realizing that I was basically served a plate of fried pig lard.
In Iowa, I ate at the only place near the hotels, and the food was absolutely great, but my gawwwwd, they serve enough to kill a horse. My steak was a roast, the salad was easily enough for four people or more, there were several types of bread, a bowl of butter, another bowl filled with sour cream, and another with horse radish...I'm sure there was more, and I don't remember what all was put on my table, but it was absolutely absurd!
Sweet tea is regular tea which is heated, loaded with sugar to the point of saturation, and then drank cold. In some areas in Alabama and Georgia, for example, it is served almost as automatically as is water.