Synapses firing at the speed of light, yet cool at the core, 20-something Caleb Teicher is a tap-dancing Buster Keaton—facial features composed, never commenting, co-conspiring, or telling a spectator what to think. Lacy footwork, slides and glides, grasshopper leaps, lightning kicks—the dazzlements just keep coming, all to the mesmerizing staccato fantasia of taps, embellishments varying from night to night. Caleb Teicher & Company joins the Orpheus Chamber Orchestra for a night of Bach, Villa-Lobos, and Britton-René Collins on the marimba. —M.G.