Barry pushed the bus door open and yellow air swirled into the stairwell. Barry backed up the stairs, careful not to trip. He kept his eyes on the newcomer. He looked back at Doyle. Doyle’s anxiety was palpable. Doyle’s anxiety made Barry’s stomach knot. He steeled his resolve and turned back toward the door. His hand shook as he took ahold of the slide bolt. He took a deep breath and yanked the bolt