Making noise while you are hiking in bear country can often be enough to deter a bear from coming near you.
picture by B Mully at flickr
If a bear starts to come in your direction, shouting will sometimes be enough to scare it away. If shouting doesn’t work, back away slowly. NEVER turn your back to the bear. Turning and running can activate the bear’s natural hunting instincts.
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If a bear starts charing towards you can actually punch it in the nose and it will go away
if your bear grylls sure. but for the average person your better off grabbing anything in your direct viscinity and fight for your life