Related:

• Why do you need new bands? Everyone knows rock attained perfection in 1974.
  It's a scientific fact. -- Homer, "Homerpalooza...
• Happiness is no laughing matter.
• Meet my girlfriend, her name is Ranma... Why are you laughing?
• As a matter of fact it IS rocket science.
• I'm not laughing at you, I'm laughing with you!
• I'm not laughing with you, I'm laughing at you.
• LaForge: "Data, why are you laughing?" Data: "I do not know.
  But it was a wonderful...feeling." -- "Deja Q", Stardate 43539.1...
• SMILEY :-D laughing (at you!)
• As a matter of fact, I like beer.