Nice! Yeah, it's likely you lost that over a series of days and had it hidden by water weight.

I only burn about 2100 calories a day, so it is impossible for me to truly lose a pound a day, even if I did a total fast. A fast and a lot of exercise, maybe. Doesn't sound like much fun.

The "jitter" is annoying. Even though I know it is nothing to worry about, it bugged me to see the scale go up a pound. Next time I weigh, it might be down 2, then back up 1, etc. As long as the trend is down, I can deal with some fluctuations.