The ‘pass-out challenge’ is the extremely dangerous game where people cause themselves to lose consciousness.

The trend has gone viral, with countless Vine videos popping up. A sizeable chunk of the videos show teenagers either doing this to themselves or with the help of others.

Those participating in the activity are doing it several different ways. One method involves hyperventilating for about 20 seconds, holding your breath and tightening your diaphragm. Then someone else bear-hugs you or puts heavy pressure on your chest until you pass out due to lack of oxygen and blood to the brain.

Another method involves using a belt or something of that nature to put around your neck to cut off blood supply. That slows your heart rate until you pass out.

No matter the method, it’s not only a bad idea, but it’s extremely dangerous too.