A Gentle Ping

I padded further along the quiet tiled floor, keeping my steps tiny and soft. Beside the shiny elevator frame, a round metal button glowed with a faint ring of amber light. I stood very still for a long moment, watching it. Slowly, I reached out one hand and pressed my palm flat against the cool metal wall right beneath it. A deep, quiet shudder drifted down the door panels, followed by a crisp... gentle ping from above. The low hum grew louder, buzzing right through my feet.