"Hickory smoked," boasted Hog Heaven's menu in reverence to the barbecue gods. These words aren't the only abstraction of barbecue to be found here. Hog Heaven is a minuscule shack off Centennial Park in Nashville, located literally behind a McDonald's and adjunct to a honkytonk dive. There are a few key tenets to the art of barbecue, the holiest of which is using wood smoke to flavor meat. But does this always make for the best barbecue?