My parents left, and I started making noise. One of the neighbors got annoyed and started banging on my ceiling with his fist.
And I thought no one could hear anything, since no one had complained before.
Damn, I'll have to stop making noise, because he (the neighbor) will complain to my dad, and my dad will give me a hard time.
I could also try moving to another room, although I'm not sure if that will help.