I don't want to get too gross here, but...my entire digestive system was emptied out. There was nothing left in there.
By a fortunate coincidence, I weighted myself before and after this incident. I actually managed to lose 7.6 pounds. Not only that, my stomach was flat as a board! Sexy!
Of course, I would much rather be healthy, even with the bit of a belly I have. And I definitely DON'T want to go through that again.
It really is kind of amazing, though, how much one's weight can depend on food, even BEFORE metabolizing it.