Green bolted out of the blocks real quick, he probably wasn't off side but he was 2-3 metres ahead of everyone else which caught the ref's eye.
Green realised the optics of the situation and realised he was going to get penalised so he quickly turned around and went back to the line of defence but it was too late and the referee blew his whistle.
It was an average penalty.
I don't really agree with the fans at the ground chanting referees suck etc. You don't want the referees to start hating the warriors and as it was we did get one absolutely crucial call out of them on the Maumalo intercept.
Mind you - their line speed seemed suspiciously fast all night. Broncos seemed fast as well.