As Nick had warned, he does feel a little giddy. His knee warms, almost as if it's been bathed in sunlight, then the feeling recedes with the giddiness and the ache fades with it.

It's not healed, he can tell, he'll still need to be careful and to put ice on it later, but the pain is significantly reduced, as is the swelling. When he moves his leg carefully, most of the stiffness is gone, too.

"That is better," he says with a smile. "Thank you."