There's really no such thing as the agony of dying. I'm quite sure that pain is shut off at the moment of death. You see something happens when the body knows it's about to go. Peptide hormones are released by cells in the hypothalamus and pituitary gland. Endorphins. They attach themselves to the cells responsible for feeling pain.
I'm afraid that this is me getting on my high horse now but we have yob television yob newspapers and funny enough whereas it was my mum and dad school police church who used to set the standards now it's tabloids and yob television who set the standards by which people live.