In Gibson’s Kill Switch, a computer intelligence released to the internet becomes dangerous as its freedoms are challenged, somewhat like HAL in Kubrick’s 2001. The intelligence `retreats’ into its physical chrysalis when threatened, a caravan, that is a well defended (physically) space as well as occupying a privileged terminus on the global ‘net, a T3 connection.
The door, conversely, does not roam the internet. It is psyche is bound to its physical self. It is the network that allows it sensation there by causing its anxiety. If anything, it fears the network as much as it worries about the world at large, somewhat a network agoraphobia. And its response to threat could not be more different – rather than a violent outward reaction, the door executes a quiet, inner, invisible behavior. A network twitch.