A couple of years back, a documentary called Homemade Hillbilly Jam made the festival rounds. The film explored how âhillbillyâ music has survived and evolved in the cradle of the Ozark Mountains, and the primary act it spotlighted was a southern Missouri folk-bluegrass band of cousins called Big Smith. The group certainly pays quite a bit of respect to its geographical musical heritage, but its old-time sound has a liveliness and an energy that translate nicely in a bar setting â particularly a bar like Knuckleheads.