Having Martha Tilton as a guest causes him to reminisce about when they worked together with the USO during World War Two, on the island of New Guinea. During the show, Jack performs his stand-up, then starts playing his violin, when the sirens sound and enemy planes start bombing, everyone runs off but jack keeps playing. Eventually two Japanese soldiers, all that's left after a hari-kiri wave, surrender if he'll stop playing. (thetvdb.com)