While at a bike shop in Defiance, MO--we found a kid's toy that made a fog horn noise! We laughed about that all day! When we went back the next weekend, it was gone Everytime I come up behind clueless people, I want that fog horn--it's also bilingual. We have quite a few older, oriental people on our bike path. They clearly don't understand "on your left" but have learned "hello" means we are coming up behind and they step over, smile and wave. They understand "hello" and think we are just being friendly

Dogs on retractable leashes--I just cringe and wait for impact as I go over my handlebars.

Kids. I had one child who saw me, froze and smiled as I said "hello" and waved. Mom, however, freaked and bolted in front of me. SO, yes, don't split Mom and baby--even if BABY understands your intentions.