Go to the scene right before you see the Nut Sorting Room door and Wonka and the gang walking down the hallway. Wonka faces the door and comes to a stop. Mr. Salt says, "Ah, this is a room I know all about." He then bumps Wonka (it's a little bump.) Mr. Salt whips out his business card, glances past Wonka (I'm guessing he's looking for a queue to stop the scene because of the bump) then continues with the scene.