Related Clues:

• 'Imagine that!'
• Head-scratcher's comment
• Attention getter
• 'My goodness!'
• "Watch it, buster!"
• Command right
• Attention-getting shout
• "Man!"
• 'Good heavens!'
• 'Amazing!'
• 'Wait a minute!'
• ''I didn't know that!''
• Call for attention
• Whiz starter
• ''No kidding!''