Northstar Vale We don't want you to know

He felt the attack on his shoulder, something had landed and he could only hope that Collision would be true to his word and not aim for painful attacks to have the knight concede before the injuries were too much. His body jerked back and that's all he knew, and so Hiero pressed on, using that lack of pain to both his advantage and disadvantage as it didn't have him flinch back but instead he could move forward and thrust his jaws onto his friendly opponent with an open mouth full of teeth to meet Collision's own shoulder or chest. 

Unlike most, Hiero knew his own rules. There was no clamping down, only a push with his maw to signal what would have been a more vicious attack should this had been a real fight. In an attempt to twist his body away from the warrior, he gently tugged to see if he could pry himself free safely and wind up parallel to the solider, ass to ass as he playfully tried to bump Collision's hips with his own. 

Because why not have a little fun with this? A little laugh.