Before the expected assault, Thorin gave Bilbo a Mithril vest-shirt to wear as a gift, constructed of "silver steel" - he described its protective qualities for warriors: "No blade can pierce it.They are within a week of meeting the deadline of their six month trial period.Realizing heir young flier""s foolhardy action and expressing his own grim fatalism about aviation, Geoff reminds his partner of their commitment o running a business - and the very nature of their life-and-death enterprise.She alerted him to the impromptu ""audition"" by promoting her niece""s professional dance experience: "I wouldn""t dream of boring you with the performance of an amateur.The film""s award-winning musical score by John Williams (who wrote the scores for Spielberg""s four previous films) enhanced the soaring, sentimental emotions of the film.