Three years ago Jimmy Callahan, just out of college and living at home, started getting severe headaches. Two weeks later doctors found a brain tumor and gave him two weeks to live. "Well," he thought, "I guess I don't have to go to work tomorrow." Black comedy anchors this piece about Callahan's experience, which consists of interspersed monologues and vignettes. Sometimes the mix of over-the-top humor (the three supporting actors display great range caricaturing hospital staff, coworkers, and family members) and heartstring tugging (Callahan does a lot of sobbing and praying) is awkward. But Jack Bronis's (usually) snappy direction and Callahan's clever writing elicit a steady dose of laughter. The best medicine indeed. Through 1/28: Sat 7:30 PM, Second City Training Center, Donny's Skybox Studio, Piper's Alley, 1608 N. Wells (fourth floor), 312-337-3992, $5-$10. + Excerpts from the show are performed Sun 1/15, 7 PM, as part of Chicago SketchFest (see sidebar).