Related Clues:

• 'Funny!'
• Chat-room chuckle
• Theme of the puzzle
• ''Turnabout is fair play!''
• ''Serves you right!''
• Online giggle
• 'That's a laugh!'
• Comic's feedback
• Sunk fence
• ''I'm laughing audibly,'' in e-mail
• Gag reflex?
• It's a laugh
• "I told you so!"
• 'Very funny'
• Punch line response