Related Clues:

• 'No kidding!'
• 'You bet!'
• 'You betcha!'
• 'You don't say!'
• 'Go on!'
• 'Really?'
• 'I'm listening'
• 'Really!?'
• 'I'm all ears!'
• Middle part of a Men At Work song title
• Disbelieving cry
• Incredulous response
• 'Is that a fact!'
• 'Let's hear it'
• ''Is that a fact?''