While Sam relaxed, Rex remained as stiff as ever. He'd gotten better at blending in, but acting natural was something that took effort. Rex stood not quite at attention but with his spine straight and his body still.

"It is hard to get used to. Did it affect your... abilities?" Or perhaps lack thereof but with that height Rex knew Sam could prove a more than capable opponent if he had the training.

Not that he expected he'd need to fight him. Still, it was second nature to size someone up and Rex's appraisal was swift.