I was excited to run across this on YouTube. Kenny Hall performs "Rainbow," a signature tune of his. My understanding is that Kenny wrote this tune. I had never actually seen him play before, only heard him. His unorthodox technique is amazing! There are a couple more videos of him on YouTube also.
For those who have not heard of him, he has been a huge influence on many old-time mandolin players. One might say he is to old-time mandolin what Yank Rachell is to blues mandolin.