Smile Sumo

[iframe src='//players.brightcove.net/4221396001/V19oeQPdg_default/index.html?videoId=5224222868001&applicationId=MIRROR%20Embed%20Offsite' allowfullscreen frameborder=0 width='100%' height='500']It's called The Back Pack Challenger and could be the stupidest, most dangerous online craze yet! Online challenges are a rage at the moment, especially amongst youngsters looking to get a name for themselves, with some being for a good cause...