Coroner's "The Mental Vortex" (1991) is the group's finest release. It is a bit slower than their previous masterpiece "Die By My Hand", sacrificing speed for more power and a deeper more complex sound. The music is dark and dissonant, with slow to mid pace grooves and rich, complex, discordant riffing throughout. The album is chock full of evil grinding riffs. Ron Royce's vocals are stark and depressive, and Marky's guitar playing is adventurous, ranging from jazz fusion, to psychedelia, to churning, dissonant, mid-paced thrash. After this release, Coroner became harder to categorize than ever. Impossible to pin down to the trappings of thrash metal, on this release their sound is truly a form of art rock, mixing elements of jazz fusion, metal, and a machine like dissonance that is completely their own, and has inspired industrial metal bands such as Ministry and Skrew. "'The Mental Vortex" starts off fast and brutal with "Divine Step" then slowing down a bit but growing more intense until the final track...an excellent cover of The Beatles "I Want You (She's So Heavy)". An incredible album, and highly recommended. Here's "Sirens" and "Son of Lilith'.