When will then be now?

Dark Helmet: What the hell am I looking at? When does THIS happen in the move?

Col. Sandurz: NOW. You're looking at now, sir. Everything that happens now is happening now.

Dark Helmet: Go back to then!

Col. Sandurz: What?

Dark Helmet: THEN!

Col. Sandurz: I can't!

Dark Helmet: Why not?

Col. Sandurz: We passed it!

Dark Helmet: When?

Col. Sandurz: Just now!

Dark Helmet: When will then be now?

Col. Sandurz: SOON!