Look before you lunch

But a very different Bassett from the fizzy rejoicer who had exited so short a while before. Then he had been all buck and beans, as any father would have been whose daughter was not going to marry Gussie Fink-Nottle. Now his face was drawn and his general demeanour that of an incautious luncher who discovers when there is no time to draw back that he has swallowed a rather too elderly oyster.

(from Stiff Upper Lip, Jeeves, by Sir Pelham Wodehouse)