For a 1996 live interview on Terry Gross's Fresh Air, Gene Siskel and Roger Ebert were each asked to bring a scene from a film.
Ebert began the interview by saying that he was going to bring the famous clip from The Third Man with the cat in the doorway. However, upon revealing this to Gene Siskel, he was wisely reminded that the interview was for radio and The Third Man scene has no words.
Ebert changed his selection to a great monologue from Citizen Kane, and, in turn, this inspired Siskel to bring an almost reactionary scene from a film that was current to the time the interview was being taped.
Here are both those scenes. Watch the Citizen Kane clip, then the one after.