1) Bombour falls into an enchanted stream and remembers nothing of their journey when he wakes up.
2) Bilbo names his sword Sting. He used the sword to kill the giant spider and feels braver and sure of himself afterwards.
3) Bilbo gets the spiders away from the dwarves by throwing stones and scaring the spiders off.
4) Thorin is missing after the battle with the spiders. He has been captured by the Wood-elves and taken to their king who has him thrown in the dungeon.
5) I'm not sure about this one, but the dwarves refused to reveal anything about their journey.
6) Bilbo helps the dwarves escape by having all the dwarves hide in empty wine barrels and tossed through the trapdoors into the stream below.