Suspended over the stage in separate Plexiglas boxes, a married couple, Cheryl (Geraldine Singer) and Frank (Don Oscar Smith), bickers in a narrative that punctuates the story below, where a pair of artists, Pon (Ken Roht) and Deedo (Bill Celentano), also squabble — but these two create, dance and frolic as well. When not playfully chasing each other around the workshop with hammers, the artists labor, not always happily, on a sculpture of mammoth proportions. They share a workshop with Uncle (Jack Kandel), an artisan who uses his hammer to make "happy shoes." Only the artists’ helper, the silent, much oppressed Nancy (Kristen-Lee Kelly), seems to hear Amazement (Laura Martin), a goddess-like figure who hovers over the stage. Written, directed and choreographed by Roht, Echo’s Hammer examines the processes of creation and destruction. The production is visually stunning, thanks to Jason Adams and Alicia Hoge’s masterful set. Roht teases the audience by displaying parts of the sculpture, building suspense by having the artists actually assemble their project of steel and odd-sized wheels on stage. As the bitter married couple on high, Singer and Smith are superb, gamely slithering in and out of their clear plastic boxes. Boston Court, 70 N. Mentor Ave., Pasadena; Thurs.-Sat., 8 p.m.; Sun., 3 p.m.; thru June 4. (626) 683-6883.Written 05/05/2005(Sandra Ross)