Bangin'

I can hear my neighbors outside complaining to each other. Apparently they can hear a banging sound, and they don't know what to do about it. So far, one has tried banging on his ceiling, and now they're all out of ideas.

Hello, my neighbors that play Rock Band at 4am. I'm putting some shelves together. (If they bothered to ask; they know it's coming from my apartment, why don't they knock? Am I scary?)