Robert Biggs said he was hiking near Paradise, Calif., on Monday and stopped to watch a family of bears when the mountain lion attacked.
Biggs thinks the bear knew who he was, and that's what saved his life.
"The bear was 350 to 400 pounds and overpowered that lion, and they just shook and went to the ground. They rolled and the...noise of the sound of the animals fighting was tremendous," said Biggs.
The California Department of Fish and Game said it can't substantiate Bigg's story, but Biggs said it happened. He also said he was attacked by mountain lions two other times in the past.