Rai gets one when he uses his Blood Field for the first time in-story. He's up against a huge modified monster. He's a real serious One-Winged Angel and his face has been mutated to a horrifyingly demonic face, giant fangs, purple skin, and all. Rai's reaction? Kneel. Cue the biggest Curb-Stomp Battle ever. There is nothing left of that monster, but a crater.
And in the next two chapters, the ensuing fight between Rai and 6th Elder and 7th Elder is just crazy.
Chapter 322. Tao and Takao are about to die at the hands of a real werewolf, and they knew they would all along. They were just buying time for M-21 to escape. When M-21 realizes that he's about to watch his friends die again, he unleashes a full werewolf mode.