Hoagie the mixed lab defended his owners from a mountain lion when they were all hiking in the Santa Ana Mountains in California.
The dog fought off the lion and they all escaped, but the dog was severely injured.
UPDATE: DID HOAGIE START THE FIGHT?
The guardians of truth at the Los Angeles Times report that this heroic tale may be a bit exaggerated:
Two game wardens searched the Bluejay Campground in the Santa Ana Mountains in Orange County and interviewed Morse. Based on the evidence, they say, Hoagie attacked the mountain lion, not vice versa.