He isn't sure why John is reaching out to him at first, but Ianto reaches out to take the hand that John offers him nonetheless. Water egress training. Ianto's frown deepens as he listens to John describe it and tries to imagine the training itself. It honestly sounds like some of Ianto's more vivid drowning nightmares, truth be told.

"Trust you?" Ianto echoes, a question in his tone as he does. Trust him to do what? Not that he doesn't. Trust John, that is. He probably trusts him the most out of anyone on the planet, in all honesty. It's the water that Ianto doesn't trust. And why shouldn't he? It's like John had said, it's only sensible. Especially because Ianto himself is really no swimmer at all.