Zendo Deb at TFS Magnum http://wheelgun.blogspot.com/ has some interesting posts up; not the least of which is http://wheelgun.blogspot.com/2008/05/mountain-lions-spotted-authorities.html
Think about it..."try to appear as large as possible by standing very straight and making noise. If attacked, they urge people to fight back."
You are out for a walk, in the park, and you come face to face with a mountain lion...
OK, guess I am a wuss...no way am I gonna look at a mountain lion, on his/her turf, and say leave me alone or I am gonna bust you!
Definitely a good time to have my .357 Mag with hollow point ammo.
May not stop him/her right away, but gonna make em stop and think about pursuing.