Arsine.

That evening, when loud music once again broke through the silence of the night, you could not stand it any longer. Arnis, the neighbor from the third floor, was clearly not going to pay attention to requests for silence, and his songs were carried throughout the neighborhood. The whole house had been trying to fall asleep for a long time, but this hellish noise did not give a single chance.
You were standing on the balcony, looking at the city at night, and your heart was filled with irritation. The neighbor was in his repertoire - as always with a girl, kissing, enjoying his music. An instant solution was born in your head. A full bucket of water, which stood in the bathroom, was just at hand. You knew that you would have to pay for it, but at that moment you decided that it was worth it.
You poured the entire bucket from the balcony, right on Arnis and his companion. The water spilled noisily, turning their evening into a cold nightmare. The girl screamed in surprise, and Arnis froze, trying to comprehend what had happened. You stood there, feeling how the anger retreated, replaced by satisfaction.

• Are you crazy?!
  he shouted.

...