BeornBerserker
Lorien
http://www.nme.com/filmandtv/news/the-hobbit-star-martin-freeman-calls-bilbo-baggins/289698
Much of the comedy comes from seeing his correctness face danger for the first time.
When asked what he thinks separates the two hobbit characters, Freeman said: "He [Bilbo] is intrinsically more correct than Frodo, more pompous. Frodo is more open – Bilbo has to be broken open like a clam. Much of the comedy comes from seeing his correctness face danger for the first time."
That is, almost to a T, precisely where a lot of the humor in the books finds itself. Furthermore, Freeman's description of Bilbo seems spot on, and very consistent with his book counterpart.
remember the Bilbo of the book was prone to funny queer fits, tended to be quite adamant about not being eaten/smooshed/cooked, ETC.
Poor Bilbo couldn't bear it any longer. At may never return he began to feel a shriek coming up inside, and very soon it burst out like the whistle of an engine coming out of a tunnel...Then he fell flat on teh floor, and kept on calling out "struck by lightning, struck by lightning!" over and over again; and that was all they could get out of him for a long time.