Using strobe to scare animals does not work for me. A fox will not like it and trot away, but coyotes pretty much ignore it. Deer will slowly feed in the direction opposite from me. Rabbits will really take off with any strong light. Have not tried it on bear or mountain lions yet. Hope it will work, but I will not rely on it at this point. Others might have had better luck. For a human aggressor would it just be an irritant or would they be stopped? I like a headlight for camp chores and a thrower for animal identification. Self defense is in a different category, but whatever works for you.