Some very resourceful Lost fanatics have reversed the speech in the brainwashing video that was shown during the "Not in Portland" episode. As you will hear, a voice is heard to say "Only fools are enslaved by time and space." This is not the first time that the show has utilized backwards speech, however. Many viewers believed that, during Shannon's visions of then-missing Walt, Walt was heard to whisper a message backwards.
Be sure to check out the video below.
YouTube - Lost - Backwards Speech - Not in Portland