A big part of this trigger is the idea of “ritual.” When people go through an event together, it becomes something of a ritual. Rituals pull people together and create some of the most powerful experiences we as human beings can have. In fact, ritual is a cornerstone for nearly all religion. In the modern Western world, we are somewhat starved for rituals (which, again, explains why sporting events are so important to so many), and that’s why this type of experience can be a peak experience for us.