It happens to you when walking on the street you suddenly begin to hear a strange, growing noise. It is not clear where it comes from, where it is born. It is as if hanging in the air and surrounds from all sides, gradually approaching and filling the space around. It gets louder. And here you see, right next to you, a muddy veil. It envelops you in a second and collapses ... cool, refreshing jets ... of rain.