Is it possible?!

Is it possible?

I have this elliptical strider and it has a digital reader that tells you how many cals you burned. After a little over an hour it said I burned 700 cals. I took my weight before and after this and it showed a difference of 2/10 of a pound which means i actually burned 700 cals. My scale is not off.
Is it actually possible? with a simple sharper image strider? Im not even tired.

1 week ago
I was hoping it wasn't water-weight...is there a chance it isn't?
Btw, i got it from sharper image.

Apparently it is, but if you lose that liitle amount of weight in such a short time it's probably water weight.