Boom tube

A Boom Tube is a transient interdimensional corridor used as a transportation system by the inhabitants of the worlds New Genesis and Apokolips as created in Jack Kirby's 4th-World series of comic books and used extensively in other DC properties. Neither New Genesis nor Apokolips have been established as existing in Young Justice to date, but the depiction of a Boom Tube at the end of the episode Bereft and attributed to a "New Partner" of The Light, suggests that the major DC villain Darkseid, ruler of Apokolips is the character mentioned.

A Boom Tube is summoned into being by Apokolips/New Genesis technology, usually in the form of a "Mother Box" or hand-held "living computer" capable of determining the destination. The tube appears with a blast of energy and resounding "BOOM" and connects unlimited distances in Space/Time through a short corridor. The Tube disappears quickly and without a trace if it is not actively kept open.