I don't get this line...

It was culture shock: The City Slickers were modern guys who live by what the Surgeon General says, but Curly was a throwback to another era when people thought for themselves (for better or worse...).

Curly would have said his time had just come, but Phil saw it from the present day perspective that a little more fiber in his diet and some time at the gym would have avoided the whole thing.

It is kind of interesting the way Curly's breathing sounded, though. This man may really have been the toughest man Mitch had ever seen, but he was pretty much worn out health-wise.

I think srnumber's answer was too involved. Simple explanation: bacon, altho enormously delicious, is terrible for your heart. Curly should have been a healthier eater.