Officials in Yellowstone National Park say a Massachusetts man was gored by a bull bison Saturday near the Norris Campground. Spokesman Dan Hottle says the bison threw the man 10 feet in the air and then pinned him to the ground.  Hottle says the man suffered a broken collarbone, shoulder blade, several ribs and a groin injury in the encounter. He was airlifted to an Idaho Falls, Idaho hospital and is expected to recover. His name was not released.Park officials say the man was not taunting the animal, but let the bull approach within a few feet of where he was sitting.

Park rules require visitors to stay at least 100 yards away from bears and wolves and at least 25 yards away from all other animals. If an animal approaches, it is the visitors responsibility to move a safe distance away.

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