Related Clues:

• Return for a buck?
• ''Impressive!''
• SLAM
• Hairdo feature, perhaps
• Expression of surprise
• With 60-Down, ''Wow!''
• Explosive sound
• Economic upswing
• Gunshot sound
• Fourth of July sound
• Unwanted engine sound
• La-la intro
• Stunned response
• "___-la-la!"
• Backfire sound