At least he looks less freaked out panic attack, and more super duper embarrassed. Rex doesn't exactly think he's a cool guy, but man, anything even vaguely mushy shatters his calm demeanour. He's shocked he managed to keep it up in Maya's presence and is carefully making sure his back is to her for a bit. Uncomfortable maybe but not offended.

But still vengeful apparently.

"You're really going to get it now," he has another dramatic point. "Choose your method of demise."

He's playing. He actually is. At least you got him into the spirit, Pete.