Critics’ Choice

* Laura Comstock’s Bag-Punching Dog (24th Street Theatre, 1117 W. 24th St., L.A., [323] 461-6069). Tim Sabourin, above left, and Joe Fria appear in Circle X Theatre Co.’s world-premiere musical about the early days of the film industry. “Sweeping, consummately well-realized and vastly entertaining, a technical knockout with Broadway potential” (F. Kathleen Foley). Thu.-Sat., 8 p.m.; Sun., 2 and 7 p.m. Ends Sept. 15. $20; Sunday matinees, pay what you can.