Pulling up behind an SUV today, I see a flash of yellow outside the right-rear passenger window. The yellow waves up and down, and I can’t make out what it is. As we stop at the light, I see that whatever-it-is is attached to a white stick.
    Whack, whack whack: The stick smacks against the window frame; the flash of yellow jerks up and down. The SUV heads left, the yellow flash turns – and then spins in the wind.
    Ah! A pinwheel!
    I suspect the small hand wielding it has just learned a lesson in planetary forces.