The heavy hiss of automated valves echoed sharply throughout the entirely sealed vehicle depot, sounding like a nest of disturbed vipers hidden within the high corrugated iron ceiling structure. Following the mechanical lockdown of every primary and secondary escape portal, a thick, pale yellowish vapor began to spray aggressively from the extensive network of overhead laboratory distribution pipes. The toxic gas rapidly cascaded downward into the expansive hangar bay, expanding horizontally and mixing heavily with the volatile petroleum vapors rising from the vast lake of sabotaged fuel on the concrete floor. The interior atmosphere instantly transformed into a highly suffocating, opaque mist that completely distorted the harsh red glow of the facility's emergency strobe lights. Zeven imm
