Basically, I was refilling an empty digestive tract in one day.
Oh man, prime rib—you guys did it right. I once did a three day fast and broke it with an enormous meal of ham hocks and beans & rice and cornbread. I have never had such a satisfying meal. Incidentally I lost about ten pounds over the course of that fast and quickly gained back about six of it. I figure that was the water weight portion. The other four pounds or so took a while to come back.