One of my regular commuter bikes has a bell, but the other one doesn't. I realized earlier this year from the reaction of pedestrians that when I say, "Passing!" it does sound kind of like a yell.

So, believe it or not, I've started singing it. "♫Pass ♪ ing!♬"

I guess it may make some people think I'm a dork, but who cares? By the time they start laughing I've whooshed by them and I'm gone.