It's unbelievable to me how people can just stand nearby and watch others suffer, whether it is from a sudden body reaction such as a heart attack or from physical abuse they are witnessing, like rape. According to the bystander effect, the phenomenon where the greater number of people present, the less likely they are going to help the person in distress, this is not uncommon in the world today. As we can see in the video posted, nobody was willing to help the boy lying on the ground, seeming to be unconscious. Many people walked by him, some even stopped, looked at him for a few seconds and then kept on going. It wasn't until a little bit later when an authority figure, a teacher, took the initiative to help the young boy.
There may have been some alternative reasons for this aside from the bystander effect or as our book would say, some alternative hypotheses, so we need to rule them out. Some of the students may have recognized this being an experiment and just kept on going with their day, not wanting to get involved. Others may have known this student to be a "class clown" and thought he was just trying to be funny, yet there had to be a few students who walked by and thought something was wrong, but still didn't do anything.
I myself have been part of the bystander effect, but not as a bystander, instead as the helpless victim of an accident. I was going up for a rebound in basketball at the same time a girl over six feet was. I was 5'3", so you can guess who jumped higher and got the rebound. Unfortunately for me, not only did I miss the rebound, but the girl's elbow came down straight into my eye, which had me running off the court screaming. I remember everybody staring at me and nobody came to me help. I was thinking "what the heck, isn't somebody going to help me?" Thankfully my coach finally ran to help me, but it took a minute or two for it to finally kick in to him. I wonder what everyone one else was thinking. I just hope now that we have read and learned about this phenomenon in class, that we don't take part as a bystander, but rather as the hero who helps save the day.