I'm going to knock on my neighbor's wall at midnight.
What would trigger you to make so much noise at that hour?
So it annoys him while he's sleeping.
It would be very rude to make so much noise late at night just to bother your neighbor. Your relations with the neighbor are going to be very tense if you do this kind of thing. You should be quiet so as not to annoy your neighbors at night.
It's just a stupid wall, who cares?
I think that a lot more people are going to be bothered by these actions. It is not okay to bother your neighbor with such noises at such a late hour.