In the scene described, a waiter is seen relaxing at the counter, moving his head in rhythm with music that is chaotic and overwhelming. The sound created by numerous guitars lacks harmony, producing an unsettling atmosphere that feels disordered, almost maddening. This music evokes a vivid image of instability, suggesting a connection to insanity.
The narrator perceives the cacophony as reminiscent of the disturbed thoughts of individuals on the brink of madness. The imagery of lunatics committing violent acts, like dismembering animals, reinforces the idea that the music mirrors deeper psychological turmoil. It's a stark portrayal of how music can evoke powerful and disturbing emotions.