Heather-Lee Mainville Mabrywell here's something many people
   don't know: Most of the people who do it (including the kids who
   make the cinnamon challenge imitation videos) - they know the
   trick (they don't want to get hurt either and know how to
   research on the 'net. Mind you - I say MOST but not *all* -
   there are always the dumb ones who plunge ahead without
   thinking)