I had always heard that pigs were tough. My wife yelled up the stairs one day that there was a pig in the yard. I asked if it was pig (I envisioned Babe) or a wild boar. "HELL, I DON'T KNOW!" was her response. When I came down and looked out the back door, a 200+ lb wild boar was nose to nose with my dog.
I shot it with a .270 and it rolled, got up and ran away. No blood trail and I never found it. I always heard they were bullet traps and now I know it's true.