Black rain coats the windows

From Infictive

Oh fuck! It starts raining hard and the windows go black seem an oily substance you can smell from the other side of the glass. Everyone here twist their heads about looking in panic, You are pretty sure no one is going walk out of here alive. You are no longer frozen in shock. You take a swig of coffee that you have sprinkled a little vodka in from your flask. It's so dark in here that spiking drinks is pretty easy to do. The others are up by the windows talking in quiet scared voices.