Send these,the homeless, tempest-tost to me, I lift my lamp beside the golden door.
VOA: special.2010.05.06
What's more, the sensors are apparently also able to detect the proximity of the object and adjust the resistance of the door accordingly -- for instance, slowing the door down if you're about to slam it into a lamp post.
Shortly after the movie started, they and others noticed the emergency exit door to the audience's right swing open, spilling light from an outside lamp into the darkened theater.