Comedian Mark Viera has seen a thing or two while growing up in the Bronx. After he witnessed a mechanic fix his car with a screwdriver and a rock, he was too terrified to get in. His humor ranges from his family and the first amendment to growing up watching old TV shows and making dead-on impersonations of the people that surround him. The show starts tonight at 7:30 p.m. at the Improv and Viera has appearances scheduled through Sunday. Tickets run from $17 to $20. (Trenholme)