No, that would be shark attack, I think. She may have been carrying food, or maybe the mountain lion suffered from a disease to make it so bold.
They are bold because no one hunts them anymore. It has been outlawed in CA. It's the same in states that have outlawed hunting lions with dogs because that makes hunting lions nearly impossible. There have only been 11 fatalities from lion attacks in CA since 1890, nine of which have occurred since 1986.