Here's a really funny one (if you actually watched it):
Ms. Cartman: "Doctor, did you find out what's wrong with him?"
Doctor: "I'm afraid he's running out of time."
Ms. Cartman: "Why, what's wrong with him?"
Doctor: "It's his time. It's running out."
Ms. Cartman: "Well, what can we do?"
Doctor: "Well, I suppose we can try a time transplant. I'll have to call a specialist."
South Park, Charmed, Buffy The Vampire Slayer / Angel, Tru Calling, Family Guy, TrippingTheRift, FreeForAll, Futurama, Jackass, Lost, That 70's Show, Celebrity Deathmatch