Rob Scallon might have the best job ever. In addition to his own songs, the YouTube star has made a solid living covering the likes of Metallica, Cannibal Corpse and Slayer on stringed instruments that aren’t guitars. Take his latest concoction, for example. “Cowboys From Hell” is the song that signaled Pantera’s arrival to the national metal scene. Hair band no more, the song’s a concise, fierce anthem. Performed on a Dean ML Dimebag ukelele, however, it’s a little less fierce, but still pretty rad.