Okay so I don't think they meant 20 full size pies, but fats of that size are definitely known to eat entire cakes, pies, pizzas, etc in one sitting. So I'm not sure it really matters. They talk about eating smaller pieces of cake towards the end, but I'm pretty sure that doesn't mean much when a "slice" of cake for them is like this: https://www.youtube.com/watch?v=gsMnHOKA-JI