Hogs are very viscous creatures. If you get them when they are still suckling and are planning on keeping them around for more than a couple years you need to saw their tusks off, otherwise they soon discover they can kill with them. Once a hog gets a taste for blood ... shoot it before something bad happens. The old timers use a wire saw to cut the tusks off.
"Sad. I hope it was the heart-attack scenario."
A guy I knew up in Iowa had a heart attack while driving his old John Deere tractor. The kind with the big back wheels, long front end, two tiny wheels on the front pitched inward. The wheel turned and it kept driving in circles backwards. I'm gonna leave the rest to your imagination, but the most horrible scenario you can imagine is pretty much what happened ...