Tom Morello (Rage Against the Machine, Audioslave) used an Ibanez locking trem on many solos. On the track "Sleep Now in the Fire" from "The Battle of Los Angeles", he uses the vibrato bar in unison with kill-switching to raise and lower the sound of the feedback from his amplifier. On the Audioslave track "Original Fire" from "Revelations", he depresses the bar to slack and then taps the strings against the pickups and then releases the bar to raise the pitch of the sound. This emulates the sound of monkeys laughing.