Pipes
I live in a world of thin plaster walls and loud pipes. This means that every time the people upstairs decide to use their kitchen sink, I hear it. I don't mean I hear it by trickles and tickles. Oh no. I hear it by thunderous echo. Sometimes I think these people are using the tap as some sort of amusement device. They turn it on, and off, on, off, on, off, on, off. They can't possibly be washing anything given the tiny seconds of time the water actually flows. Maybe they just like hearing their pipes burp, ad nauseum.