"Where grizzlies do follow through on a charge and actually attack, they will usually bite at the head. The best defense is to lie prone, face down, legs spread to make it harder for the bear to flip you over, and hands gripped around the neck. Normally, once a grizzly is sure you are no longer a threat, it will leave. This is why most wildlife agencies in grizzly country advise that people play dead if attacked. Struggling or fighting back will almost certainly intensify and prolong the attack.