Related Clues:

• "Holy jumpin' catfish!"
• 'Gadzooks!'
• See 73-Across
• Great success
• 'Damn!'
• 'Great Scott!'
• ''That's amazing!''
• “Groovy, man!”
• "Gee, that's amazing!"
• "Holy moly!"
• Impress, and then some
• "Holy Toledo!"
• ''That's incredible!''
• Admiring interjection
• 'I was not expecting that'