Two guys are hiking in the woods when they suddenly find themselves face to face with a snarling grizzly bear. One guy immediately slips his backpack off, pulls a pair of running shoes out of it, slips them on his feet and starts hurriedly tying the laces.
The second guy says, "You fool! You can't run faster than a hungry grizzly bear!"
The first guy replies, "I don't have to run faster than the bear. I just have to run faster than you."