He hits the ground with a grunt, back hitting solidly and the surprise of not being where he expects himself to be is enough to shake him out of game face, at least momentarily. He tenses, eyes widening as he takes in the new environment with a cold feeling of dread. Narrow corridors and rusty metal walls are never a good sign and there are flashes, more a sensation than an image, the Initiative, Germany, U-boat.
But this isn't either of those places and he finds himself soon enough, correcting himself from whatever brief moment of genuine fear he might've experienced. This is all fine.