The next morning, as I left for school, I heard the upstairs door shut, so I waited to catch the guitar playing dude and confront him. To my horror and surprise, I noticed that a sweet old lady in her 80s or 90s came out of the apartment!!! I realized then that the guitar player had actually been next door to me instead of upstairs. That poor lady, she probably thought a dump truck with nitro-glycerin was crashing through her apartment.
Moral of the story, be careful when confronting people about noises in an apartment and do some research to make sure you are certain who is making the noise. I admit, what I did was
irresponsible and immature, but, I do have a great story to tell for years to come!