Threshold Exploration

Too many hours indoors on the carpet! I marched straight toward the balcony sliding track to inspect the boundary. Clack, clack! My feet reached the tall aluminum metal sill. The grooved metal channel was wide, deep, and completely blocked my stride. I planted my lower feet firmly, reached both upper arms upward, and locked my grippers onto the outer rubber weatherstrip. One solid heave! My joints clicked through three smooth angles, swinging my frame straight over the silver metal rail. Outside, warm air greeted my front torso plates. A brand new zone unlocked!