點解體內藏毒叫做”運毒死士”呢

因為只要毒品的包裝破損，毒品洩出體內，運毒者就即時死亡，神仙都救唔番，命博。

edmond_lst is only partially correct.

The damage of the package will allow the illegal substance to be able absorb by the body and causing overdose.

2009-04-28 07:21:53 補充：
Usually, antidote is not always available (because this method is used mostly in air travel). The carrier will eventually died from overdose, not sudden death.