The brighteness never fades from Thor's face, even when the hammer hit the ground. He had some of the same problems with Mjolnir when Odin first bestowed the hammer to him.

"No, no, it's great!" he exclaims. "The twirling -- that'll come later, I used to mess that up all the time and then I got very good at it." The twirling was what made it possibly for him to fly, after all!

"Can I give it a try?"