this can't be happening. doesn't matter if this person is small and less harmful-looking than the one that manipulated him left and right, but if Loki could declare war on the entire world, Bruce didn't doubt that he could finagle his apperance to look like an innocent boy-child. why him? Bruce wants to hide and lock himself up in his room and never come out again, but he doesn't have that luxury here, and it certainly doesn't help that he's in the middle of an ocean with no way out.
of course, there's always the possibility that it's some random kid with an uncanny resemblance to the Loki he knows but....after so long of having every single shred of optimism taken from him, he's a little doubtful. don't do anything stupid, banner.
it's not until minutes later that he manages to get all his emotions in check, enough to speak in a reasonably calm tone of voice. ]