Contagious laughter refers to the phenomenon where one person's laughter triggers laughter in others. This response is often linked to social bonding and can create a sense of connection among people. When we hear someone laugh, our brain may instinctively respond by laughing as well, even if we don't know the reason for their laughter. Research suggests that contagious laughter can have positive effects on mood and stress levels. It activates the release of endorphins, which are chemicals in the brain that promote feelings of happiness. This shared experience can enhance group dynamics and foster a more enjoyable atmosphere in social settings, such as gatherings or performances involving comedians.