Sentence 1: Kate was in the backseat as her mom drove up a very steep hill. 
 Sentence 3: She opened it intending to close it hard 
 Sentence 4:  But the gravity began to pull her out of the moving car 
 Sentence 5:  Finally her mom turned and the door closed and pushed Kate in the car 
 Option 1: Kate needed to shut the door better and asked her mom to pull over. 
 Option 2: Kate realized her door wasn't fully closed.