Sure he cuts back his calories, but 70 hotdogs is about 21k calories. I don't think he goes into a 21k calorie deficit over the next few weeks. That's an insane deficit. That would be the equivalent of not eating for 8.5 days, which is not possible since it would mess with his training. He probably cuts it back some fraction of that, say 10k and his body's increased metabolism adjusts for the rest.