I Want You (She's So Heavy)
"Mental Vortex" continued the evolution over "No More Color". Continuing with the previous album's technical formula, the speed metal formula was re-integrated into Coroner's sound on this album but with a tone that made it sound not at all like "R.I.P." or "Punishment for Decadence". There were slower songs but none of the songs on "Mental Vortex" stayed the same speed for very long. The songs on "Mental Vortex" ranged from four to eight minutes. The last track "I Want You (She's So Heavy)" is a cover of the Beatles song, and a video was shot of it. Overall, the tone was a shift from the thrash/technical of "No More Color" which showed them gravitating towards their opus "Grin".