The scene at the end of the trial, as Billy excitedly enters the courtroom with a review of the play, was shot twice. In the shot used, an extra accidentally blocked him, and he gently moved her out of the way. It was just a split second - but made that extra's day. (I was that extra, uncredited)
Extras were asked to wear neutral or blue clothing, not red - so that the extras would not stand out or be distracting during the courtroom scenes.