Hopscotch, the "mobile opera" created by the Industry and directed by Yuval Sharon, opens in Los Angeles on Oct. 31; previews ended this past weekend. A video montage gives a few tantalizing glimpses of what's in store. I strongly urge anyone who lives in or near LA not to miss it. The only comparable experience I've had is Stockhausen's Mittwoch in Birmingham, for which Sharon happened to serve as assistant director. The principal composers are Andrew Norman, Andrew McIntosh, Ellen Reid, Veronika Krausas, David Rosenboom, and, doubling as music director for the production, Marc Lowenstein.