After the thunder roared, the hobbits hid.

The hobbits hid after the thunder roared.

bob ran down the road and fell over.

Because he fell over he ran down the hill.

Bilbo slept in a cave, so the goblins attacked

The goblins attacked, while bilbo slept in his cave

The cart came to a wheezing halt, so gandalf strode into the hobbit hole

Gandalf strode into the hobbit hole, because the cart came to a wheezing halt

Jim was interested in the idea, so he rang his friend

he rang his friend, because he was interested in the idea

Owls are nocturnal, so this mans they are active at night and they have excellent eyesight.