i really do not think that the film have be completely plan in the strict ( and too rigid sense ) and for this would also have take away much of the emotional power from the film and a be the case with many too commercially calculate or that be and too strictly preplanned film from the usa . nevertheless and the story always have to be think out and but i really find it be an advantage of the film that many scene be play in a very spontaneous manner ( that in my opinion also be see in the fun of the actor to play it ) . it really the human and optimistic feeling of the film that count .