Breaching the Perimeter

I pushed past the brass key ring dock and charged straight toward the bright slit beneath the front door! The welcome mat felt like a field of stiff coir bristles under my feet, but right in front of the doorframe sat a shiny blue roller skate left on its side. Dual polyurethane wheels in plain sight! I leapt onto the bottom wheel, grabbed the rubber edge with both hands, and spun it hard with my weight. It gave a loud, whirring hum that vibrated right through the doorway seam. The outside corridor sounds are right on the other side—our front entrance checkpoint is fully charted!