Mass hysteria

Mass hysteria is when a group of people become extremely agitated and may show similar physical and mental symptoms. Usually, it is caused by people hearing a rumor of something scary or worrying, and it spreads quickly to other people. It's like when a rumor spreads through your school that someone has a contagious disease, and then everyone panics and thinks they have it. People can begin to show physical symptoms like shaking or sweating, and sometimes these symptoms can spread to other people nearby. Mass hysteria can be made worse by people's fear and anxiety.