Related Clues:

• 'Talking to me?'
• 'Would you repeat that?'
• 'Care to repeat?'
• “Imagine that!”
• 'You said what?'
• 'Who woulda thunk ...?'
• 'Hmm, that's odd!'
• Response to bewilderment
• 'Whaaa?'
• Request for restatement
• “Well, I didn’t expect that!”
• “Run that by me again”
• 'What???'
• 'Ya don't say!'
• Less formal "Beg pardon?"