As some people have already noted again and again -- challenging the haka is not the issue at all, heck, it should be promoted! The issue is infringing the rules!!!
Pause at 0:33. Parra already offside prior to movement forward. He moved forward, more offside where ref told him to back off. He then returned to still yet an offside position. Just look at where he is standing relative to where Dusautoir's hind feet are at. »
