It would be interesting to hear from those with training and expertise in Psychology and relevant behavioral fields. For example, someone posted about a group

It would be interesting to hear from those with training and expertise in Psychology and relevant behavioral fields. For example, someone posted about a group of girls in Japan jumping to their deaths. What makes something like that possible? How does it happen? Please do not add comments if you don't have the requisite training or experience. Questions would be OK. This sub-thread could turn into a conversation between people with relevant credentials answering questions. We could all learn something from reading through such a thread. Please state your credentials if you comment or answer questions. No need for credentials if you post a question.