After studying hundreds of incidents captured on CCTV around the world, the researchers conclude the so-called bystander effect - that people will not usually help a stranger in distress - may not tell the whole story. 

QUESTIONS: 

1. Describe the video. 

2. What is the bystander effect? Explain your thoughts about it. 

3. Have you ever witnessed the bystander effect in a public place? Share it in much detail.