I’ve been there. You’re walking down a quiet street, and every step you take is accompanied by the rhythmic jingle-jangle of a dozen metal keys hitting your thigh. It’s loud, it’s annoying, and let’s be honest—it makes you feel like

I’ve been there. You’re walking down a quiet street, and every step you take is accompanied by the rhythmic jingle-jangle of a dozen metal keys hitting your thigh. It’s loud, it’s annoying, and let’s be honest—it makes you feel like