I posted this a few years back when I first went looking for it on Youtube. I had heard the tune at an Eric Johnson concert (the sound guy played it during setup). When I saw the live version I was impressed by the balls it took to use a splitter on a looper and use mic and guitar loop samples all in real-time. I have to learn this tune for something and found this great tutorial by KT herself on youtube where she shows you exactly what she's doing. Very cool.
Now go learn it everybody and buy her two CD's while you're at it.