They're asking for jokes. That's right, you may have to spew humor on command in your next job interview, just to reassure your prospective employer that even if you screw up a major account, you can laugh in the lunchroom with the best of 'em.
Help is available, however.
Van Munching takes a very scientific approach to joke-telling. He even quotes professors describing how the memory works, which convinces us that he really knows what he's talking about. After a few moments of thinking, the assistant realized that the missing pages were accidentally locked in the storage room. He assures the conductor that by the time they are needed, they'll be on the conductor's music stand. I see that they're over in the corner drinking again.