Bringing together two acclaimed German improvisers who met in Nuremberg in 1982 as teens--reedist Rudi Mahall and drummer/vibraphonist Michael Griener, "bumbling" around to learn free jazz together, heard now 40 years later as authoritative players recording as a duo in 2020 & 21 in Kotzlin and Berlin for eight energetically creative and buoyantly upbeat dialogs.