One of the capabilities of the new Nanoracks Bishop airlock (besides deploying more CubeSats) is jettisoning bags of trash from the International Space Station (ISS). This is traditionally done by cargo spacecraft — those that don’t return science intact like Dragon. However, as a demonstration, the airlock deployed some trash itself. 

First, the Canadarm unberthed the airlock and maneuvered it so it was pointed opposite the direction of travel of the station. Then, the airlock used its piston to eject the trash bag. Because it was ejected retrograde, it will end up in a lower orbit than the ISS and burn up in a couple of weeks.

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Crew Explores Artificial Intelligence, Human Nervous System on Tuesday (NASA)