If a bear exhibits a slow, cautious approach, it might be curious or trying to assert its dominance. The worst case is that it thinks you're food. Stand upright and hold your ground. If the bear keeps walking toward you, move aside and let it have the trail. If the bear walks directly at you after you have moved, be aggressive. Hold your arms above your head, shout, throw rocks and use pepper spray. (You remembered your pepper spray, right?) Stand your ground. If the bear touches you, fight it. Use a knife or walking staff and gouge at its eyes, ears, nose and mouth. If a bear rips into your tent in the middle of the night, consider it predatory and fight for your life.