'Did you say pig, or fig?' said the Cat.

'I said pig,' replied Alice; 'and I wish you wouldn't keep appearing and vanishing so suddenly: you make one quite giddy.'

'All right,' said the Cat; and this time it vanished quite slowly, beginning with the end of the tail, and ending with the grin, which remained some time after the rest of it had gone.

--Lewis Carroll

The moon tonight was a Cheshire Cat's grin.