The Glowing Button

I blinked and looked down at my hands. My fingers curled and straightened smoothly, one by one. I turned toward the frame beside me, where a small black unit was mounted. It had a neat circular button beneath a steady red light. Wondering how the mechanism responded, I reached forward and pressed the smooth circle with my fingertip. It yielded with a quiet, solid click. I remained on the tiled step, listening patiently to see what would happen next.