无常

life is an example of 无常. we don't know when life ends..
It's very scary in a way that human don't see it coming or i should say nobody is able to see it coming and prevent it that's why it's call 无常-无（不是）常（平常）(abnormal)。
once heard of the life span of a human being. . make a guess, how long is the life span of a human being?
if you are thinking of the number of years, you are neither right nor wrong=) i heard of an answer which i personally think it's one of the most suitable answer which is “一呼一吸之间”。 a human life span solely depends on the breath.. which shows why it is call 无常  because no one can assure whether the very next breath u breathe out is your last breath=)
why do i bother to post about it when it's something human can't control? because i just experience 无常 and i think it's very disturbing.. my SIM CARD suddenly spoiled when i'm about to reply a sms and the thing is it's working the whole day until then.. unable to receive calls and smses and forward calls and smses is the worst.. it's like nobody can contact you as if you are being quarantined until replacement of SIM CARD.. life's like that.. it's always unpredictable=)