Related Clues:

• "I'm amazed!"
• "Interesting!"
• "That feels great!"
• "Would you look at that!"
• Contented sigh
• ''That's awesome!''
• Sound associated with a 40-Across
• Cry at the circus
• Patient reply?
• Pleased reaction
• Massage sound
• Fireworks watcher's exclamation
• Indication that one is being rubbed the right way
• Sighing sound
• ''That feels g-o-o-o-d!''