I hope I am never in a situation that puts a loved one's life in my hands.
If I ever had to make the decision to "pull the plug," it would drive me crazy. I'm not even using that word as hyperbole; I mean it would literally make me insane. First, because I would agonize over it prior to its happening, and second, because I would lie awake at night and wonder if I'd done the right thing. I would never sleep again.
Also, I hope I never have to change an adult diaper, MOM AND DAD.