Beings (sometimes known as "souls") can be in a wide spectrum of states. In the sorrier end of that spectrum they can get to acting very much like material mass does, as a result of too many pushme-pullyou adventures, overwhelms, omissions and commissions with blame or guilt attached, and so on. And they exert quite a lot of pressure just by directing energuy when they are in good shape. So it wouldn't surprise me to see a couple of ounces difference at the moment of departure.

A