From Walker Percy’s The Moviegoer: 

Cheppity cheppity chep chep. Chep. Silence. Cheppity chep chep. Chep.

  It starts as an evil turn of events. There is a sense of urgency. Something has to be done. Let us please do something about it. Then it is a colour, a very bad colour that needs tending to. Then a pain. But there is no use: it is a sound and it is out there in the world and nothing can be done about it. Awake.

Cheppity cheppity chep chep. Chep. Silence.