Friends break brick on girl's vagina with hammer (video)

In a viral video, which was posted on a popular Chinese social media site Weibo, a woman is seen lying on her back, legs held apart by friends as bricks are smashed on her vagina using a hammer.

Eventually, all the bricks are smashed and the woman stands up, as though nothing has happened. It is not clear what prompted the woman to display her skill or whether any injury was caused. People also gathered to watch what was going and also to take pictures and make short video clips. Watch the video below:

Is this not madness?