I considered that it might have been the wind, but there were no windows leading to the outside in the replica hospital. I watched as the door swung continuously. The person beside me noticed me staring at something and gasped when she saw what I was seeing. The instructor paused and asked us what we were looking at. We told her that the operating door was moving on its own, so with her laser pointer (used during discussion) she turned around and pointed the red light at the door. The moment the laser hit the door, the swinging stopped. The whole room went quiet, and the instructor closed the center divider without a word or comment on what just happened.