Claude had been surprised when Peter had suddenly disappeared. When Peter had reappeared at his side, Claude had barely had time to recover from the sudden change when a fist was plowed into his jaw. Not a sensation that he was unfamiliar with, but cheap shots were more than enough to spike Claude's temper.
"You little shit," Claude growled as he raised his hand, dabbing at the trickle of blood at the side of his mouth. There wasn't much space for them to fight on the landing of the fire escape, but Claude's mind wasn't telling him to be logical and reasonable right now. It was just screaming 'ATTACK!', and he had lunged at the younger man before he could even consider where they were.