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 happend to then? Colonel Sandurz : We passed then. Dark Helmet : When? Colonel Sandurz : Just now. Were 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. Dark Helmet : How soon? [Corporal rewinds the tape back to scene showing protagonists wandering in desert.] Corporal : Sir! Dark Helmet : What?! Corporal : We have identified their location. Dark Helmet : Where?! Corporal : It's the moon of Vega. Colonel Sandurz : Very good, set a course and prepare for our arrival. Dark Helmet : [increasingly flustered] When?! Corporal : 1900 hours. Colonel Sandurz : By high noon tomorrow, they will be our prisoners. Dark Helmet : Who!! [mask falls down]

http://www.moviequotedb.com/movies/spaceballs/quote_22051.html