A delay of a tenth of a second in noticing an unexpected event is of little consequence when walking, but when driving could kill you, or someone else.

走路的时候，发现意外事件有十分之一秒的时间延误几乎没有造成后果，但是在开车的时候，可能会使你丧命，或者其他人会丧命。

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If a person becomes unusually paranoid or suspicious, believes someone is out to get him or her, or says God told him or her to kill someone, these all indicate that the person may do something to harm someone else.

CNN: Insights on why people 'snap' and kill