Steve Dumaine is the tuba player in the National Symphony here in Washington, DC but has many talents beyond his immense orchestral abilities. I first met Steve when we were both in high school in New England. He played the Vaughn-Williams Tuba Concerto with the Greater Boston Youth Symphony Orchestra back then and pretty much scared me with how good it was.
This clip is not him playing the Vaughn-Williams or anything close to it! This performance is from the 2008 Army Tuba Conference and features Steve playing a solo by the original bass player for Metallica, Cliff Burton. I saw Metallica perform at the Worcester Centrum back in 1991 and it remains to this day one of the best rock concerts I've ever attended. 1991 was after Cliff Burton had passed away, but Steve does a great job of getting to the essence of Cliff's playing in this clip.
And my favorite part of this clip, for humor reasons, may very well be at the 2:00 mark. Steve Dumaine is a beast on the tuba!