People respond differently when they encounter the unexpected. One person who comes upon the scene of an accident might drive by, while another is compelled to do something, even at the peril of his or her own life.
In a time of crisis people who may not have appeared confident before sometimes surprise everyone with their heroics. Others who are very confident in public shy away from involvement. What is happening here?
Those who respond impulsively to a crisis do so because their focus shifts from self to others. The urgent need of another person motivates us to take confident action.