[He looks back at her, enough to catch her eyes for those last few seconds there, looking at her with an equally lost look -- there isn't a handbook for situations like this, are there? He tries to school his expression into something that isn't showing the sting when she hurries past him without a word, not that she's looking, anymore.
For a moment he simply sits there, staring after her, but- no, no, he won't let it be like this. Moving swiftly, he gets up from the bench and after her.]
Elsa! I mean- Your Majesty, please, wait! Just-
[... shit, the train. It's moving, slowly enough for now, so Bucky runs to it, catching the door handle and trying to open it while the train continues to rise up, carefully not thinking of the last time he was on a train and the steadily growing distance between himself and the snowy ground beneath him.]