New situation puzzles

Every night before going to sleep, Lisa locks the door of her house and attaches the key to a string. Why?

A car driver causes an accident when he crashes into a bike, as he was making an unexpected turn at a crossroad. When the policemen arrive, another man gets arrested. The one who was driving is carried home.

Jack goes on a trip with his compass. After a long walk, he stops to eat a sandwich. He is not able to find his way back afterwards.

Jack and Judy were lying on the floor dead. There was a puddle of water and broken glass on the floor. How did they die?

A woman goes to the library, takes a book and cries out.

A little girl was warned by her parents never to open the cellar door. If she did, she would see things that they did not want her to see. One day, while her parents were out, they accidentally left the cellar door unlocked. The girl opened the cellar door. What did she see?

Francis dies of a heart attack at work. His colleagues are there when it happens. However, they do not call for help until Francis dies.

Before going to bed, the woman hides her shoe in the safe. What for?

A man, who was examining some school, noticed that any time a teacher was asking a question, lots of pupils were ready to answer. Moreover, every time the teacher was choosing another person and the answer was always right.

An avid birdwatcher sees an unexpected bird. Soon he’s dead. What happened?

Two devices are commonly used by people. They are created for the same purpose. But one of them has lots of details and another does not has any. What are these things?

Paul goes diving. How could he know he would be burnt to a crisp?