 They both arrive in the pocket at the same time and kick the energy into an overdriven state of chaotic -- yet jubilant -- free improv, where there are no ties to gravity at all until Previte introduces a tom-tom and Zorn responds with a gorgeous angular legato.This is only one of dozens of surprises on Euclid's Nightmare.Zorn fans will be familiar with the level of histrionics employed here, while followers of Previte's more refined work may be put off by the constant atonality of the work.