OnStyle's 'Body Actually' carried out a hidden camera experiment. The experiment observed people's reaction to a woman walking around the busy streets of Hongdae in white pants stained with period blood. 

Varying reactions took place. Out of all, most expressed shock but failed to approach and notify the woman of the issue. Meanwhile, some took caring actions and even lent their clothes to cover up the stain for the woman. 

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Watch the interesting experiment in the clip. How do you think you would've reacted if you were in the same situation?