Blast! has a built-in constituency: the millions who are or have been in high-school marching bands, or twirled batons and engaged in what may have seemed to the uninitiated to be otherwise dorky activities. For the members of the Blast! troupe can identify: these are the kids who were once mocked by the cool crowd and now strut their stuff to admiring legions around the United States. Originating with the Star of Indiana drum corps, Blast is a frantic, loud show of colorful pageantry that's part Riverdance, part Stomp, and part homecoming parade. The music is performed in marching-band fashion, featuring an impressive panoply of brass and percussion: Ravel's Bolero and excerpts from Aaron Copland's Appalachian Spring get Blast!-ed, as well as some lesser-known gems, such as Samuel Barber's Medea. "Gee Officer Krupke" (from West Side Story) obviously wasn't quite perky enough, so the interpretation here integrates various musical quotes, including the theme from The Simpsons. What the performers lose in subtlety, they sure make up for in sheer oomph. --Elisabeth Vincentelli