How to hide and attract the predathor

To make the snapper come close during the waiting technique, we will have to try to go backward and disappear behind a rock in the moment when the snapper starts coming towards us. The precise technique says that we should keep the speargun, which is kept in a rear position, still. The speargun should exactly have the point positioned side to our face. We will then be able to move backward keeping the speargun still in its position, until when we will find ourselves with the weapon in front of us held by our straight arm. pointing at the snapper.