He's trying very hard not to be one. Which is not a thing most people have to do. But he has been trying since heaven told him to be a hero.

"Three, two, one," he counts out for Peter's sake as he steps backward and begins recording. Gives a moment for Peter to start eating and then, slowly and smoothly, circles around to catch Peter in the act (pun intended) of filling his mouth with apparent flies. "What're you eating, Peter?"

Rex's tone doesn't modulate much, which helps him in the acting front.