Johnson said he was attacked by the grizzly Wednesday in the Tom Miner Basin, north of Yellowstone National Park.
He said he couldn't remember how big the bear was. "How can you tell, when the SOB is trying to give you dental work?" he said.
Johnson, 55, remembers grabbing the bear by the nose with both hands as it tried to bite his face and throat. And he remembers taking an incredibly hard blow to the head. Doctors used 75 staples to reattach his scalp to his skull.
He also has a deep gash under his right arm, claw marks on his chest and back, bruises all over his body and some deep teeth punctures on his left forearm.
Johnson said he was moving quietly through the woods, looking for petrified rock and believes he probably awakened the napping female grizzly with a cub.
He said he heard a sound, looked up and the bear was coming at him in full charge. The bear knocked him on his back and went for his face.