My grandfather may not make it past next week. 
People get old, and people die; it's been that way since people came into existence. I just dreaded these days as a kid and can't believe I'm now here.
What hurts most is how quickly he deteriorated. He was the epitome of oxen strength and came into his current state only in the past few months. The one thing all my family keeps saying is how hard and fast he fell.
This sucks and I'm sorry to hear of it.
My grandfather was super tough with crazy energy. He was doing a frame off restoration of one of his cars in his mid 80's. That's where he ultimately checked out. Came in for a drink, back to the garage and boom, double stroke, gone within a week.
I did service in a nursing home for phone and TV repair, in fact it was the same one he spent his last couple of days in. After working in there for a couple of weeks and seeing people in various stages of dying, I felt so much better seeing that my grandfather checked out hard and fast in the middle of doing what he loved most, not rotting away with mental and physical health slowly turning him into an immobile corpse.
No matter how someone goes it always very hard, but I prefer it to be quick.