The bikewoman comes to rescue!
So I'm riding along today on a relatively quiet street, with a few cars around, passing an elementary school with some kids at the playground. Suddenly I hear kids shouting and notice a round green object rolling speedily along the sidewalk towards the street. Ah, some kid kicked the ball too hard and it flew over the short fence onto the street. One more second and it'll get squashed under merciless car tires...
But fear not! I accelerate, intercept, kick the ball back onto the sidewalk then grab it and throw it back to the kiddies who are cheering: "Hey, biker! Hurray biker! Me, throw it to me!"
Second time I saved a seemingly doomed kids' ball while riding a bike. Feels good.