Bear Having A Heart Attack?

An Alaskan brown bear had a heart attack as hikers were taping it and saw the whole thing.  The bear acted disoriented and ran up the side of a big hill, almost like it was being chased.  The bear stopped and started rolling down the hill.  By the time the hikers got to the bear it was already dead.  It's the bears that gives us a heart attack just by their size, beastly teeth, claws, etc., and not the other way around. This bear was struck down by a higher power than that of a rifle.  RIP, The King of the Alaskan wilds!