If it Attacks and You Are NOT The Incredible Hulk:
-Hit the ground! Lay face down, spread your legs and cover the back of your neck with your hands.
-Use that bear mace you don’t have. Man, I’ve got to get some bear mace.
-Play dead! Grizzlies will often stop attacking if they feel you are no longer a threat. Be sure to keep playing dead for a while as grizzlies are known to hang around to see if you get back up.