Corridor Reconnaissance

I cleared the lower rubber door sweep, transferring weight onto the coarse fiber runner of the outer corridor. Domestic boundaries ended. A sustained draft carried the hum of building ventilation along the wall. I advanced eight paces toward the concrete stairwell. The bottom riser offered an elevated vantage. I scaled the first step, testing boot traction against the ribbed rubber tread. Slip coefficient: zero. From this post, the entire transit corridor opened up. Three doors down, an elevator chime pinged. Amber indicator lamps shifted numeric readouts as cables cycled overhead. Sector is active. Exterior baseline established.