Quotes: Conspiracy Kitchen Sink

Nobody knows my true identity
For all we know, I'm John F. Kennedy's
Love-child with Nosferatu
We can't know, but still we've got to
Nobody knows how deep the mystery goes
But ancient caveman history shows
We're all descended from
The same evil alien slime
Lemon Demon, "Telekinesis"

Green Arrow: Does everything have a sinister motive in your world?
The Question: Yours too; you just don't know it.
Justice League, "Fearful Symmetry"

Bart: So, finally, we’re all in agreement about what’s going on with the adults. Milhouse?
Milhouse: Ahem. OK, here’s what we've got: the Rand Corporation — in conjunction with the saucer people — under the supervision of the reverse vampires — are forcing our parents to go to bed early in a fiendish plot to eliminate the meal of dinner! We’re through the looking glass, here, people...
The Simpsons, "Grampa vs. Sexual Inadequacy"