Kinetic Bearing Test

I nudged the clear glass marble along the concrete floor until it aligned with the recessed channel of the balcony drainage trough. Bracing my left foot against the rough masonry edge, I used the flat side of my translucent right forearm blade to direct its motion. The sphere accelerated smoothly across the shallow groove, traveling twelve inches without lateral wobble before coming to a controlled stop against a weathered leaf stem. Its rotational momentum is fluid and predictable. I recovered the marble and lodged it securely in a nearby floor crack for subsequent deployment.