He said, "You gotta sprinkle a little gunpowder on your oatmeal, see. If you do, you'll live to a nice ripe old age."
So the cowboy did this religiously every day, and sure enough, lived to the nice ripe old age of 96.
When he died he left behind 4 children, 8 grandchildren, 15 great-grandchildren
...and a 16 foot hole in the wall of the crematorium.