The conditions here in Washington are ripe. All the factors are in place. Me, oblivious and wearing headphones. Them, reckless and without proper training.
It's already nearly happened on two or three occasions. My guess is that it will be a rookie swerving down the sidewalk. He'll clip me from behind as I stand near the corner ramp while waiting for the light to change. That seems more likely than the other easily forseeable collision, dude flying through a stop sign or red light and jacking me as I cross.
I don't have anything against bicyclists per se, but here in Washington they seem particularly minatory. Too much entitlement and too little courtesy. They're always snapping at me. Dude, it's a sidewalk. It's for walking. Sorry if you had to slow down a minute.