Bottom line: Puppets are creepy. For Atlanta artist Todd Alexander, they evoke questions about individual autonomy. His mixed-media work features layers of wax, charcoal and paint over photographs in innovative and occasionally disturbing explorations of human self-awareness. He blurs the edges around objects, creating a dream-like opacity, and the final images seem like flashes from a distant memory. His domain is the soup of the human sub-conscious. Nashville Gallery owner Susan Tinney strives to bring museum quality work to Nashville, and admittedly loves an exhibit that offers a good challenge. Her shows generally offer more questions than answers — Alexander’s program at Tinney Contemporary downtown is no exception. Saturday’s art crawl is the last chance to catch it, so don’t forget to bring a friend — the puppets are watching you.