As Bob ran down the road, he fell over. 

The hobbits hid because the thunder roared.

The goblins attacked when the Bilbo slept in the cave.

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

Jim was interested in the idea as soon as he rang his friend.

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