Actually, dog walking is the one situation where I was thinking a shake light could actually be worth it. I see that you think the same way. If you walk your dog in pre-dawn/night conditions, day after day, then that's a decent amount of time where you need a bit of light. Enough light to see the poop to pick, enough light to warn bicyclists and motorists of your presence, and enough to keep from walking off the side of an embankment. You're moving around anyway, so shaking the light isn't much of an extra burden. Wonderful! Now, if I only owned a dog...