As you can plainly see from this unretouched representation of an early American folk singer the idea of using our guitars as 'instruments' of self defense, while simultaneously wielding the proper 'musical' firearm as a harmonious accompaniment has been in practice for a long time. This fellow was no doubt in the middle of some rousing grand finale to elicit such an emotional response from his patrons. How else can you explain why someone would try to play musical knife in the middle of a musical gun solo.