When Agreus let those words slip from his mouth, Pan wanted to beat him into oblivion. Not because what he said was highly disrespectful, but because he knew that something as triggering as those words were they wouldn't cause him to be stunned or shaken to the core. Instead, it would cause him to transition into a tactical rage. No, Pan knew from the very beginning that John wasn't using anything near his full strength.
Yet, all of that didn't matter the slightest as what was said was said, and neither Pan nor Agreus had any control over the aspect of time to take back what was said.
Just as Pan was about to take over, Agreus spoke up in a brashly self-confident tone and said, "How are you sure you didn't try to kill them, failed, and forgot due to the trauma of your wicked action!"