After two days of relative quiet from the little monsters next door, they decided to drum on the shared wall today. This occurred at 12:15 p.m. and lasted for about a minute. This "drumming" was not a hammer and nail kind of sound. It could have been made with a rubber ball on a tether, but knuckles rapping on the wall would be more likely. It was a very rapid sound, like drumming. It wasn't extremely loud, but it was just hard enough for me to pick up the vibrations from the wall to know where the sound was coming from.
Still, regardless of how loud or hard it was, the fact remains that they're not supposed to do stuff like this. A random bump or bang is to be expected, but no bouncing of tennis balls, no drumming on the walls, no deliberate noise-making with the intent to annoy me.
What was I doing before this happened? I was sitting quietly, trying to locate a particular recipe. I need to write down the ingredients that I need to purchase in order to make it.