Quote ="Magic Superbeetle"Walsh was tackled. The ball is dead. He subsequently loses the ball due to injury, but the ball is dead. Hence, Walsh should of played the ball on the first (I confess I have no idea why is was a scrum) '"
I'm not sure that's correct. Players can and do knock on after the tackle is completed (such as when regaining their feet) and the ball being dead does not affect this.