I need this. I need it now. I’m a faster walker than about 94% of the population, and 99% of the population doesn’t know how to courteously walk down a sidewalk, so this would be a very convenient and unobtrusive way to let a slower walker know I want to pass them. Currently I usually just scrape my shoe loudly against the ground as I’m approaching someone from behind so that they know I’m back there. It’s not always effective; half the time they look back at me and don’t even freaking move out of the way. WHY DO YOU THINK I’M MAKING NOISE?? This bell would make me sound like a bike, though, which would probably get them to actually move.