Heather Krueger has long been a go-to musical performer and choreographer in the Bay Area. But in “Falsettos,” the musical nervous breakdown for her character, Trina, is one of the single greatest show-off numbers for an actress in the musical theater canon. And Ms. Krueger takes full advantage of the moment to flaunt her prodigious vocal skills and comic timing. When your husband has come out of the closet and run off with a man, it’s OK to sing “I’m a queen, he’s a queen! Where’s my crown? I’m breaking down.” Composer-lyricist William Finn has great fun as the song develops, and Krueger does, too—finding lots of suggestive options with a huge chef’s knife and a NSFW move on the kitchen faucet. stageworkstheatre.org—Jon Palmer Claridge