I did NOT know that... maaaaan... that's a rough story there, really sorry to hear that, but I can relate.
My Dad died on Oct. 26th, 2012, just 3 three weeks after they found stage 4 pancreatic cancer. He'd just been complaining of a little stomach pain, he thought it was gas. By the time they found it, he didn't stand a chance. No more than just a couple weeks later he was doing pretty bad and they had to put him in the hospital. The doctor told us that his insides were just shutting down. My mother, younger sister, nephew and I remained at the hospital at his side for 5 days. My dad would want to stand up at times and once while I was holding his arm to steady him, he looked over at me with this absolutely TERRIFIED expression and said... "I'm dying." I didn't know what to tell him... I still don't know what I could have told him. What DO you say to someone in a situation like that? I have no idea. But it's haunted me ever since. Going on 6 years later and I can remember that moment like it just happened 5 minutes ago. We stayed until he took his last breath.
I think watching a loved one pass is the probably the toughest thing anyone will ever do in their life... @jimnyc