Each week this Chemically Imbalanced Comedy team selects a disparaging theater review from the latest Reader and performs an hour-long improvisation of "the show we feel the critic would have rather seen." When I went, they read aloud Zac Thompson's review of Invasion of the Minnesota Normals (which he said "tries to make a case for individuality without exhibiting any"), then acted out a 50s-sitcom version in which clean-cut citizens revolt against normalcy by smoking, embracing homosexuality, and eventually killing. The cast fixated on easy pop references, but the sarcasm was thick and zany. Director Angela McMahon crafts a truly professional improv production, with efficient blackouts, precise lighting, timely and clever musical touches, and a perky pace. 6/8-7/6: Thu 10:30 PM, Second City Training Center, Donny's Skybox Studio, Piper's Alley, 1608 N. Wells (fourth floor), 312-337-3992, $10.