The Blues Face, we've all seen it, some maybe have done it, the guitarist bends a note, squints the eyes, grits the teeth, some smirk, some use a funny half smile, and various other facial contortions, so is it a technique or is it style? Do they teach it at GIT or Berklee? is it just showmanship or the result of "A good man feelin bad"? What is the proper use of the "Blues Face"? Your comments please