Related Clues:

• 'You can't be serious!'
• "Honest!"
• 'For real?'
• 'Truth!'
• 'I mean it!'
• 'Honest!'
• 'Seriously!'
• 'I'm serious!'
• "It's true!"
• ''Really?''
• 'I kid you not!'
• 'It's really true!'
• Jack Paar signature line
• ''Cross my heart!''
• "Really?"