Erik grips the púca's hand without more than a moment's hesitation, and even that seems to be more for emphasis than anything else... although, to be honest, his sigh loses some of its effect behind that breathing mask. Compliments aside, that was sort of a shit performance, as far as he's concerned. One of the last things he did before being stolen away to Baedal was lifting a nuclear submarine, and here a couple of train cars nearly knock him on his ass. Bah.
This exasperation lasts only as long as it takes for him to get to his feet, though, which he does with a negligible grunt of breath and a nod of thanks to Tadhg.

Perhaps out of spite, or something like it, Erik lifts a hand as he too approaches the now upright train cars, forcing the coupling between them to separate. Although his expression appears neutral, there is no gentleness in the gesture; the noise issued by the twisting metal is distinctly unpleasant. As though steel is capable of feeling pain.

Otherwise whole, sure. Except for this one part right here.