There's a hilarious alternate reading of the "Fly, yes; land, no!" line on the little-known Story of Indiana Jones and the Last Crusade tie-in audio CD. (Skip to the end to hear it.)

Essentially that CD features a narrator (John Rhys-Davies!) recounting the film's story as if he's reading a book, interspersed with clips from the film.

Comparing the audio of that line as used in the film with this alternate take makes me think of Crystal Skull--and the two versions of Indy's "Part-time!" quip.

Only here, Lucas and Spielberg clearly used the better reading in the film, whereas with KOTCS Harrison's line delivery in the trailer was much better than in the actual movie.