Your body is not converting all 21k calories to fat in an event like that. There are many physiological limits to caloric conversion to fat. I'm not exactly su

Your body is not converting all 21k calories to fat in an event like that. There are many physiological limits to caloric conversion to fat. I'm not exactly sure what their bodies are doing, but I guarantee you my body would get rid of that food extremely quickly before it was fully digested.