23/69: Underground Explosion23/69: Underground Explosion1969Queuebrick VideoQueueLWatchedWFavoriteFListsDiscussionWhere to watchCopy short link196923/69: Underground Explosion5mDirected by Kurt Kren·1969A report about an Underground Festival on tour through Germany and Switzerland.DirectorKurt KrenOverviewDiscussionCastCrewDetailsWhere to watchNo cast listed.