New York—After years of auditioning for major roles in movies, the effort never ceased to amaze.

Actor and businessman Arnold Samstein surveyed his parking-lot gym and revealed that he'd missed the best performance of the evening by some distance, one which, if it can be credited to anyone, undoubtedly belonged to a fifth-grader from Chester, U.K. who last week cast himself as one of the most popular toy characters of all time.

"Once again, this young fellow just pummeled his way into the hearts of millions of viewers," Samstein said, his jaw set in studied disdain. "How he managed to do this so convincingly—that I did not see coming. But if anybody has the stamina to deliver a mesmerizing audition, I know it's him."

Added Samstein, "Fellas, this was a killer. I must be brave, someone said! But for this guy, even if he falls over every once in a while, it's all OK. After all, he knows his deal. He's back with us next week."

The kid reportedly took multiple brisk laps around the gym and leaned against the wall as a trainer performed his strength-training exercise routine for the fifth-grader. Noticing his unusual ability to quickly withdraw his arms from the chest, lift a few large human limbs into the air, and continue doing this for an astonishing hour, the trainer began slowly exerting force on the child's thighs, calves, and back.

Despite learning to increasingly lift a large rubber ball off the ground, if possible, Grint was still known to lurch and kick the basketball once and for all. According to sources, the kid's mother waited until the last possible moment to introduce him to the children's show being filmed for PBS, where he quickly stole the show and passed Grint's Top-Ten star status.

Samstein confirmed that following a break, Grint came back for his second session with the muscle-man-in-training to knock down an elderly man in a golf cart, whereupon the boy was still able to quickly pull the cart to a stop and begin giggling.

"I always let the guy have a few breathers at the end, but this guy could never take a breather," Samstein said. "After the intense first round, he was really up for another minute or two. Still, he lasted a little longer than any other contestant for any role in our program. I just don't get it."

"He must have a great instinct for what works," the 61-year-old added. "If you saw the guy make it out of the elevator that way, I can't imagine that anyone was waiting to engage him in battle."