Hiruzen didn 't quite know how to react to his former student launching himself at his newest Jounin and pinning him to the floor. He very much looked as though he were having a mental breakdown. A glance at Kuniharu 's face revealed only mirth, rather than alarm or anger that might be expected from such an act. His smile spread widely across his cheeks as Jiraiya held his wrists to the floor and glowered down at him.