Possible Clues:

• Klutz's cry
• Where in Paris child gave shout of pain
• Pained expression when top of finger is cut off
• Big repair bill reaction
• Acknowledgment of being hit endlessly -- that hurts!
• Response to a bee sting?
• Pained sound when purse is not opened
• Response to a dig
• 'That must have been painful!'
• Response to a pinch, perhaps