Quotes: Pointless Doomsday Device

I suppose I can part with one and still be feared.

A note to my successors: Don't pull the switch near the chasm. It causes everything past it to die from magma.

Only a madman would create such a door. Only an imbecile would open it.
Magic: The Gathering, "Door to Nothingness"

Of course, the whole point of a Doomsday Machine is lost, if you keep it a secret! Why didn't you tell the world, EH?!
Dr. Strangelove, Dr. Strangelove