Related Clues:

• "___, why didn't I think of that?"
• Right to a horse
• Gosh
• Mild exclamation
• "Really!"
• ''Who'da thunk it!''
• ''That's amazing!''
• "No kiddin'!"
• Word before whiz
• “Groovy, man!”
• "Gee, that's amazing!"
• "Holy moly!"
• Impress, and then some
• 'Whillikers!'
• 'I don't know' lead-in