For things you really HAVE to know in life! I heard this true story the other night: a 69 year old man was camping on the tundra when he awoke to a loud snuffling. Uh Oh.
A split second later a white head, the size of a bushel basket (!) blocked his entire open window. It was an arms length away. Instinct took over in the old bar fighter and he hauled off and punched the bear on his (very sensitive) nose. That bear took off like a shot and couldn’t be found by trackers a day later. Elders later told him that was the best thing he could have done because that bear will never go near humans again.