Make sure you have pently of height if you are trying it for the first time and keep RRPM at the top throught, you need to bring back your speed to a/s zero rather quickly in order to achieve this. And you will only fly backwards relative to the ground aswell so if there is no upper wind you won't fly backwards. Be careful not to attain a/s to quickly when you decide its time to get some energy to flare as the RRPM will bleed off very quickly so lower collective first.! have fun cos it is!