President: All right, Dr. Jones. You have my attention. What is this urgent message you wish to relay?

Jones: Mr. President, I want you to take your finger off the button.

President: I'm sorry, but what button?

Jones: You know which one. The one you use in the event of an invasion. The button that fires the nukes.

President: Dr. Jones, you do realize there isn't an actual button, right?

Jones: What do you mean?

President: There's no big red button to fire our nuclear arsenal. The generals make a recommendation, and then I give the authorization to launch.

Jones: You're wrong, Mr. President. I'm positive there's a button somewhere, and with the way things are going, it's only a matter of time before you push it. I know these things because, well...go ahead, ask me how I know.

President: All right. How do you know?

Jones: Because...I'm a time traveler.

President: Dr. Jones, that is quite frankly the most ridiculous thing I've ever heard.

Jones:And yet it's the truth. Listen to me, Mr. President, do not press the button!

President: I think I've heard quite enough. I'm going to have to ask you to leave.