This example proposes to explore it using recordable voice chips: one could store a series of prerecorded phrases, aphorisms, questions etc. and play back randomly with IER, giving talking doors, escalators etc. The chips could attempt to record conversations and play them back later in the day. A pair of doors could completely ignore humans and have their own conversation. A long text, each word placed in a single module, could be replayed in broken distribution around a room etc.

This would work in the public arena, such as a shopping mall or metro. Devices would use small generators with friction wheels, in contact with the constantly moving rails of escalators. This would recuperate some of the wasted energy that is lost when no one is riding the escalator. They could be equipped with a motion sensor and voice chip, so when people are riding the escalator it can talk to them. Perhaps paying them a compliment, giving them encouragement, telling a joke and so on.

A mobile version of the device described above, with no voice. It simply leans it head (friction wheel) against the escalator belt, waits until it has absorbed enough energy to become mobile. It then backs away from the belt and rides the escalator. It gets off at the other end, and does it again, over and over.