Related Clues:

• Knock ('em) dead
• Really impress
• Impress
• Ten C-notes
• "Fancy that!"
• "I'm impressed!"
• "Shucks!"
• "Go right, mule!"
• Exclamation in 17, 23, 50 and 61-Across
• "Oh my!"
• "Amazing!"
• "No kidding!"
• Awesome!
• 'Man alive!'
• 'Like ___!'