Don Davis, who composed for "The Matrix", returned to score "Reloaded". For many of the pivotal action sequences, such as the "Burly Brawl", he collaborated with Juno Reactor. Some of the collaborative cues by Davis and Juno Reactor are extensions of material by Juno Reactor; for example, a version of "Komit" featuring Davis' strings is used during a flying sequence, and "Burly Brawl" is essentially a combination of Davis' unused "Multiple Replication" and a piece similar to Juno Reactor's "Masters of the Universe". One of the collaborations, "Mona Lisa Overdrive", is titled in reference to the cyberpunk novel of the same name by William Gibson, a major influence on the directors.