Post Malone’s country era has included a featured guest spot on Beyoncé’s Cowboy Carter, and many covers, most recently by the legendary Nashville songwriter Joe Diffie on a recent compilation. And last night he made a surprise appearance at the Ryman Auditorium to cover Hank Williams’ “Honky Tonk Blues” at the annual Bobby Bones’ Million Dollar show. He also opened a bottle with a cowboy boot while at the show. Watch video below.