Related Clues:

• Enthusiastic sound
• Back-scratchee's reaction
• "That's obvious now!"
• "Mm-hmm"
• ''Now that makes sense!''
• ''Of course''
• "What a Wonderful World" opening
• "Okay then"
• ''Makes sense!''
• 'Interesting ...'
• __ and aah
• 'What a display!'
• "___ la la!"
• Crowd's response to a fireworks display
• "What a display!"