Many years ago there was a doctor who claimed he proved there were souls. Supposedly, he would put scales under a dying person's bed and at the time of death, the scales showed a decrease in weight of about 4 oz. Hence, a soul weighs 4 oz. Whatever.
Yeah, that's pretty screwy. If you look at a cell under a microscope at the time of death, it just dies. No change in chemistry or what not. Just ceases to live. The Bible teaches that the body without the spirit is dead. A computer without it's software is non-functional. Same difference.
Don't people usually have a bowel movement when they die? probobly about 4 oz but who knows.