Agree. It would be interesting if they did this with different diets. I don't think a very low carb one would be possible though. There's no way you could down that much fat and protein in keto without force feeding. I can't manage more than 600 at a sitting a guy maybe 1000. Probably the same goes for an all fruit and veg diet. Can you imagine how much veg you'd need to eat to get through 8,000 cals a day.?