Related Clues:

• 'Oh wow!'
• 'Holy Toledo!'
• 'Gosh!'
• 'I didn't know that!'
• Cousin of 'hmmm!'
• 'My stars!'
• 'Heavens!'
• 'That's incredible!'
• 'No kidding'
• 'Is that so!'
• Comment before 'I don't know'
• 'That's amazing!'
• Opposite of 1-Down
• Breach
• 'I'm impressed!'