The chunky, syncopated groove that opens Disturbed's debut. Dan Donegan tracked The Sickness through a Mesa/Boogie Triple Rectifier on the Modern channel — his go-to for years — recording with a Gibson Les Paul Standard even though he played a PRS live. Cut by Johnny K at Groovemaster Studios in drop C#, the tone is tight and mid-present, built for the bouncing palm-mute rhythm rather than speed. Heavy strings keep the low tuning defined under the gain.