Possible Clues:

• Response to comedian with hectares of land perhaps
• ''You're a scream!''
• Prankster's laugh
• "You think you're sooo funny ..."
• 'That was soooo funny...'
• 'You think you're so funny!'
• Sounds of hearty laughter
• "The Merry Old Land of Oz" opening words
• "Serves you right!"
• Laugh line