In the Book
In the Movie
We do not find out how Gollum lost the ring.
Gollum fights with a goblin. The ring flies from him pocket and lands on the ground.
Bilbo doesn't see the ring being lost and comes across it by accident in the dark cave.
He sees it and puts it in his pocket as Gollum drags away the dead goblin.
The company is trapped on tall trees while the wargs try to get them. Gandalf fights them off with flaming pine cones and sets the trees on fire. He calls Eagles to rescure them.
They all end up on one tree and as the fire rages the Pale Orc arrives and wants to kill Thorin. Bilbo fights him with his tiny sword until the eagles swoop in and save them all.
Bilbo is frightened by the Eagles. They speak to him and tell him that it is perfect day to fly.
The eagles don't speak, and Bilbo mounts the back of the eagle and flys it.
Bombur has ALLOT of lines in the book.
But in the movie, he doesn't make a sound!!!!!!!?!?!?