Possible Clues:

• Response to 'Who, me?'
• ''Who, me?'' response
• 'Who, me?' response
• Response to "Who, me?"
• 'Who, me?' reply
• Reply to 'Who, me?'
• Words said after a surprised "Me?"
• 'Who else would I be talking to?'
• "Who, me?" response
• Emphatic affirmation