 He suggested that rhythmic loud singing and drumming, together with the threatening rhythmic body movements and body painting, was the core element of the ancient "Audio-Visual Intimidating Display" (AVID).AVID was also a key factor in putting the hominid group into a specific altered state of consciousness which he calls "battle trance" where they would not feel fear and pain and would be religiously dedicated to group interests.Jordania suggested that listening and dancing to the sounds of loud rhythmic rock music, used in many contemporary combat units before the combat missions is directly related to this.