He flung open the door with more force than was probably necessary, but instead of seeing only a wide, white expanse of nothingness, his eyes drifted down to the familiar and slight frame of Bragi's wife, Idun. Her sudden appearance stilled his actions abruptly.
That was quite possibly the last person he expected to see. The confusion registered across his face, and for a moment he could do nothing but stare at her. Why had she come all the way to Midgard to seek him out? An immediate and terrible fear took hold of him then as he wondered if her arrival meant something had happened to his brother, that he was in danger of some kind. But as quickly as that fear arrived, it soon passed; for he realized that if anything had happened to Bragi, or any of his family members; he would not likely be hearing of it firstly from Idun. And, the most obvious indicator being that she did not wear the expression of someone distraught with fear for her husband's safety at the moment. No, she simply looked... cold.
Freezing, actually. From the snow that was caked onto her hood, it appeared as though she'd walked here from a distance. And she was not wearing suitable clothing for such unforgiving weather.
His concern then greatly outweighed his desire to go out and mindlessly hack away at something, "Please, come inside." He placed a hand on her arm and urged her to step into the shelter of the cabin.
As soon as he'd shut the door behind her, he fell into another weighted pause while he stood in front of her; at a loss for the appropriate words. He was not exactly eloquent on his best of days; and right now he felt as though he hadn't strung a full sentence together for at least a week. What good did words do when everything you felt demanded a more tactile, raw form of expression.
Thor glanced down, realizing he was still holding Mjolnir, he set it aside and instead went to work immediately on building a fire in the heath. Glad to have a simple task, even if only for a moment. He hadn't bothered with keeping a fire for himself, as the cold had always been a strangely comforting thing. But she was here now, for whatever reason; and he wouldn't allow her to stand there shivering while he could do something to ease that.
He pulled one of the nearby chairs forward so that it was close to the hearth, then gestured for her to sit down as he set a few logs into the fire place. "What brings you here, Idun?" He didn't have the energy or the patience for small talk, and that much was evident in his tone.