Both Walton Goggins and his mother were champion cloggers.
First episode of any of the three Danny McBride/David Gordon Green/Jody Hill shows (the other two being Eastbound & Down and Vice Principals) not to feature Danny McBride in an acting role.
This is a flashback episode giving us the opportunity to see more of Jennifer Nettles as Aimee-Leigh Gemstone, a character who is deceased in the show's current timeline. It also means we get to see Walton Goggins out of his old age make-up and a digitally de-aged John Goodman.