Bob ran down the road and fell over so his knee was bleeding.
Jim was interested in the idea so he rang his friend and told him.

The thunder roared so the hobbits hid to be safe.
Owls are nocturnal so this means they are active at night and they have excellent eyesight.

The cart came to a wheezing halt for Gandalf strode into the hobbit hole.

Bilbo slept in a cave so the goblins attacked.