Ice Cube Bobsled

I set a slippery ice cube right at the top of a metal baking sheet propped against a heavy ceramic mug. Could it slide all the way down without spinning out of control? I gave the frosty square a gentle tap. Whoosh! It accelerated down the brushed silver ramp like a runaway bobsled, carving a glistening streak of water across the metal. Just before it tumbled off the bottom edge, I darted down and slid a shallow ceramic saucer right in its path. Clink! The cube spun into the dish, coming to a gentle, dripping halt.