Be careful while doing anything, make your mind and decide what you want. Your stupidity can be the reason for someone's tears if you do dangerous things. It may lead to unfortunate accidents and even painful death.
Have you ever seen someone doing something so silly that you end up shouting, "stop it, stop it, are you insane?". These people have done the exactly similar thing. I am sure they didn't play any drinking game before they tried these insane things.