In this video they demonstrate different situations where the bystander effect comes into play. They showed three different instances where an individual is on the ground in public showing some sort of illness or pain. They video taped these people and observed how countless bystanders just looked and walked by-- or even tried to not even look. Most people interviewed that walked by bring up how they "saw a guy reading the newspaper right by her so I thought it was ok". This study shows how people in crowds easily assume. The dress and the gender also play a big role in the assumptions. The first man was in jeans and a hoodie and could have easily been assumed to be a druggie or drunk simply because of his clothes. No one stopped to help him because of this assumption. Even when the every day looking woman was unconscious people didn't think it was their business. They search for a sign of emergency in the surrounding individuals. However, when the ill individual was a business man, giving the appearance of a trusted citizen, people immediately thought they must help. The bystander effect is purely built form assumption.