What the hell am I looking at? When does this happen in the movie?

Colonel Sandurz: Try here. Stop.

Dark Helmet: What the hell am I looking at? When does this happen in the movie?

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

Dark Helmet: What happened to then?

Colonel Sandurz: We passed then.

Dark Helmet: When?

Colonel Sandurz: Just now. We're at now, now.

Dark Helmet: Go back to then.

Colonel Sandurz: When?

Dark Helmet: Now.

Colonel Sandurz: Now?

Dark Helmet: Now.

Colonel Sandurz: I can't.

Dark Helmet: Why?

Colonel Sandurz: We missed it.

Dark Helmet: When?

Colonel Sandurz: Just now.

Dark Helmet: When will then be now?

Colonel Sandurz: Soon.