Burton's first recording with Metallica was the "Megaforce" demo. A demo tape the band had made prior to Burton's joining, "No Life 'til Leather", managed to come into the hands of Jon Zazula, owner of Megaforce Records. The band relocated to Old Bridge, New Jersey, and quickly secured a recording contract with Zazula's label. Their debut album, "Kill 'Em All", features Burton's famous solo piece, "(Anesthesia) - Pulling Teeth", which showcased his use of effects, such as a wah-wah pedal, not commonly used by bass guitarists.