Ernest Hemingway was once approached by an autograph-seeker in a Sun Valley restaurant. Hemingway kindly obliged. "Thanks, Mr. Hemingway," said the man.

Some time later, he passed Hemingway's table again. "Hello, Mr. Hemingway," he said, turning around for another pass, this time calling out, "Hi, Ernest!"

Further encouraged by Hemingway's nods of acknowledgement, the man made one final pass: "Hello, Papa!" he cried.

At this, Hemingway lowered his head, raised his arms, and bellowed: "Hellooooo! And goodbyyyyye!"

[Whence did Hemingway's famous nickname "Papa" originate? He gave it to himself -- at the age of 27!]