“I had stopped to watch a family of brilliant icicles drip-dripping from the eaves of a frame house. So clear-cut were their pointed shadows on the white boards behind them that I was sure the shadows of the falling drops should be visible too. But they were not. The roof jutted too far out, perhaps, or the angle of vision was faulty, or again, I did not chance to be watching the right icicle when the right drop fell. There was a rhythm, an alternation in the dropping that I found as teasing as a coin trick.”
    (Vladimir Nabokov)