A video demonstration by Swedish curler Oskar Eriksson is fueling discussion regarding proper technique in Olympic curling. The advanced demonstration specifically addresses the controversial technique known as 'double-touching.'

<img alt="A man touches a curling stone." height="349" src="https://i.cbc.ca/ais/5d2e7d44-aabe-4b9f-864e-0e51ff90a003,1775416216730/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C0%2C1477%2C830%29%3BResize%3D%28620%29" title="In this video provided to CBC by SVT, Swedish curler Oskar Eriksson demonstrates a double-touch infraction, saying it can alter a stone’s path. The demonstration comes after an Olympic dispute involving Canadian curler Marc Kennedy. CBC News reached out to Kennedy for a res...