Umphrey's McGee Play "Comma Later" Live on Mountain Stage

Whether you call it progressive rock, progressive improvisation or “improg,” the force of Umphrey’s McGee’s musicianship cannot be denied. On any give night they can be found performing for thousands of screaming fans, but on this week’s broadcast of Mountain Stage, they deliver a special performance for a sold-out crowd of 400. Here they are performing “Comma Later,” live in Charleston.