By Jon Wiederhorn
Updated October 04, 1996 at 04:00 AM EDT

Many bands start out by playing subversive, unconventional music, then gradually move into the mainstream. Tool do it backwards: Their platinum-selling ”Undertow” was unadventurous and commercial, while Aenima is a jagged, brooding nightmare filled with roaring guitars, abrupt rhythm shifts, and jarring sound effects. One of 1996’s strangest and strongest alt-metal records. A-