Under the Sweeper

I pushed past the mailbox door and ran across the lobby floor! Right ahead, the giant glass entrance door sat waiting. At the very bottom, a stiff black rubber draft stopper sealed against the smooth ground. I dropped flat on my stomach without hesitation! Using both hands against the polished tile, I wriggled right under the flexible bristles. The rubber brushed firmly across my back with a steady rasp. With one final kick, my head popped out on the exterior concrete curb! Fresh morning air hit my face, and real sidewalk stretched right in front of me!