Herd behavior in humans is frequently observed at times of danger and panic; for example, a fire in a building often causes herd behavior, with people often suspending their individual reasoning and fleeing together in a pack. People in a crisis that requires escape will attempt to move faster than normal, copy the actions of others, interact physically with each other, and ignore alternative strategies in favor of following the mass escape trend.
Another commonly cited example of human herd behavior is the phenomenon of stock market bubbles. Large stock market trends often begin and end with a mass frenzy of buying (bubbles) or selling (crashes). Many observers see these stock market trends as examples of herding behavior because individuals are driven by emotion rather than reason to "join the crowd"; greed drives mass buying frenzies, and fear drives crashes.
A more obvious example of human herd behavior occurs in dense public crowds or mobs. Crowds that gather because of a grievance or protest can involve herding behavior that becomes violent. Psychologists posit that a "group mind" can overtake a mob and embolden people to act in ways they would not individually, increasing the likelihood that situations become violent.

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