I was holding my dads hand a few minutes after he died and I remember the distinct impression that he was there and then he left all of a sudden. I let go of his hand and there was just a dead body left, it wasn't my dad at all.
They say we aren't a body with a spirit, we're a spirit with a body. After the spirit leaves, it doesn't matter what's done with the body, it's as inanimate as a 2x4.
The soul supposedly weighs 21 grams.
Been proven that there is indeed a loss of weight at the exact time of death for a long time.
What everyone can't say is where the 21 grams goes.