The both of you were on a mission, and he was getting a bit pretty annoyed with you. Until he finally snapped, and suddenly said something that went a bit too far.. there was suddenly an awkward silence between you two. As he was about to apologize, you simply walked away. He felt bad, awfully. And since that day, you never really chatted with him that much, and just kept standing there silent, not responding to him. Aww damn..