In the R22 Safety Course, which I did (in the UK) soon after getting my PPL(H), was taught that when the horn goes off you open the throttle, then (or at the same time) lower the lever. We were told that far more accidents were caused by pilots overriding the governor and throwing the helicopter into autorotation and getting it wrong, than by real engine failures. So I teach this way too. And I really like InducedDrag's idea. Because unless you practise it, you never know how you'll react to these things. And he's not preventing them overriding the governor; he's showing them what to do should it occur. Good idea.