Sentence 1: Hannah dumped her boyfriend before she left school. 
 Sentence 3: In addition, he tried to drive around her when she got out of the bus 
 Sentence 4:  Hannah was furious and threatened him 
 Sentence 5:  As soon as she started to call the cops, he left 
 Option 1: While she was driving home, he followed her car. 
 Option 2: While she was riding the bus home, he followed the bus with his car.