Modern people's collapse is a kind of tacit breaking down.
They look quite normal.
They will still chat and laugh, play and sport noisily, and engage in social interaction.
They are calm on the surface, but in fact, they have had enough annoying things in mind accumulating to a certain degree.
They will not slam the door and smash things, nor will they burst into tears or act hysterically.
But maybe for a certain second, their bad moods will reach the acme.
They will not want to talk anymore, and not really break down in heart. They don't want to live any longer, but they dare not to die either.