When my neighbor plays his music or watches a movie loud enough that all that low frequency goodness seeps through my wall and keeps me from falling asleep. Which also leads to pet peeve #53: living in an apartment. With neighbors below, above, and beside you. Middle second floor living sucks. I cannot wait until I have my own house. Surrounded by trees. Completely away from any annoying neighbors. The problem, you see, is not that I have noisy neighbors. The problem is that I have neighbors at all. None existent neighbors make no noise. There really are too many people on this planet.