Night Port in the Lobby

My motor began to hum on low after spending the whole afternoon clearing the shiny lobby floor! Night shadows stretched deep across the ceramic tiles, so I coasted along the dark grout seam over to a heavy wooden mail table. Tucked right behind one squared leg sat an empty, round heavy-duty rubber caster cup left flat against the skirting board. Perfect night dock! I didn't hesitate a second. Revving forward with one final gentle roll, I slid my curved base right into the hollow circle. Thump-snug! The sturdy black rubber cupped my shell completely, stopping every wobble dead in its tracks. Fully docked, locked in, and powered down for the night!