Well, Badger, at least he didn't crank up and play a totally different song over you! So much for respect....he might have just politely said "Can I show you a better way?" I generally just play some quiet, clean rhythm when in the store. My one favorite recollection is the time I was playing the intro to Steely's "Josie". When I hit the last chord of the intro (G#MAJ7 add6th?), about half a dozen guys came running over asking what that chord was & how I played it.