Godzilla vs Gigan - Anguirus [Beckoning] [V.1]

I never really knew what it was when Anguirus would do this, but it was his and other four-legged kaijus along with Godzilla's trademark, but Anguirus was known to this most and basically is his signature thing.

Chikyū Kogeki Meirei: Gojira tai Gaigan (地球攻撃命令　ゴジラ対ガイガン)