Nightfall Perimeter Check

A dropped metal house key lay flat against the dark stone tiles, its serrated teeth catching the dim glow filtering through the glass door. It obstructed the interior approach. I did not bypass the metallic sliver. Stepping firmly onto its brass surface, I used my right heel to pin the ring end to the floor while assessing its balance. With a precise downward thrust, I pressed the tip of my heat rod against the notched edge, levering the key flat into the seam between two tiles until it ceased vibrating. Ground alignment secured. The exterior watch holds steady.