Related Clues:

• Comic punch response
• 'I know that one!'
• Distressful reaction
• Sock-in-the-gut reaction
• "Color me impressed!"
• Reaction to skyrockets
• Pained interjection
• "Check that out!"
• Enthusiastic sound
• Back-scratchee's reaction
• "Yipe!" (or an apt title for this puzzle?)
• __ and aah
• Reaction to an insect bite?
• 'What a display!'
• "___ la la!"