You know what I don't understand?

So yesterday I probably ate the mos I've ever eaten. I have not had the nerve to count it up yet, but I'll tell you when I do. I was at a part and well there was a lot of food. So anyway, I ate a bunch. But I weighted myself this morning and I actually lost a pound and a half. I'm now 131. Meaning I've lost fifteen pounds total. I don't know how I did that, considering I ate a lot the day before, too. I'm fine with those, I'm not complaining.