Theil => Thile, rhymes with "mealy"

Him and the band playing Bach on bluegrass instruments. http://www.youtube.com/watch?v=p1NNBf7uVQ4

Him and the band playing Reptilia. http://www.youtube.com/watch?v=qayc6yJXG-8

Covering Radiohead, then transition into a Gillian Welch song. http://www.youtube.com/watch?v=igbbbWqDVbM

And there's a lot of original compositions as well.

Pretty unstoppable.