Sure the room was unoccupied but he knew the lab geeks were watching the whole thing from the control room and had safety protocols ready to go if Scout ended up getting close to succeeding in his mission to kill him. But Caleb wasn't worried, he'd faced plenty of Hellfire lackeys who were bigger than him. He'd be fine.
Caleb chuckled at his comment, "Trust me my offensive skills have nothing to do with my power," he paused, "Hellfire trained me well. Mixed martial arts is my specialty."