Just the other night, my wife and I were on our nightly walk with our Springer spaniel, when, suddenly, a huge bull moose popped out onto the trail and made straight for my dog. Luckily, I had my Surefire U2 Ultra on me and had it dialed in to its "stun" setting. I yelled at the moose and hit it in the eyes with 100 lumens of light. It stopped in its tracks, and my wife grabbed the dog and slowly backed away, our hearts pounding. The whole while, I kept the light trained on the moose. He stayed put, blinded by my bright U2. I don't know what would have happened if I hadn't had my U2 on me, but I was darn glad to have it. The situation could have turned out much worse without it.
See the U2 flashlight: