I watched my grandad die and I think it kind of mentally scarred me.
The doctor came in at midday and told all of us, including him, that he definately 'wouldn't see another sunset' and his organs were stopping working 1 at a time about every hour but there was no point in trying to fix any of it as the op would kill him

. Basically he would be dead by sundown - effectively from old age.
When afterwards we protested about the doctor telling my grandad, the doctor said my grandad had a right to know. Fair enough I guess on reflection. I'd want to be told.
On that last day my grandad suddenly 'found god', and did a lot of crying. You had to know what a totally 'hard' ex-military and COMPLETE athiest he was his whole life to understand how wierd that was, and how he suddenly seemed his will was 'broken'. AS I said, it mentally scarred me.
Then for about 4 months I couldn't get out of my head how would
I handle the last day. The doc. saying 'Well, you're not gonna see your last sunset'. Would I be brave? A 'man' about it? Could I handle it? What if I couldn't? What a horrible way to 'sign-off' - breaking down and all that.
I started thinking about what it'd be like to slowly slip away and know it was happening, the complete inevitability of it. Almost like drowning, and knowing there's no way you can get out of that room that is slowly filling up with water ..
Screwed me up for a while actually

And there's no real advice at the end of this post either