It doesn't take Ianto too long to right himself this time. He at least does register which directions are up and down and that his feet can touch the floor of the pool the same as John's. It's just the panic of the water closing in on him that causes him to react irrationally, and he needs to take a few moments bracing himself against the other man, breathing steadily, before he can collect himself enough to reply.

"It's no use," he says, a little breathlessly, as he forces himself to straighten and loosen the vice-like grip he's fastened on John's arm once more. "That may be as good a result as you're going to get." He's not sure how many more times he can keep doing this though before he has to just call it a night. It's easier said than done to relax after all when his fear of the water around him has his body all but vibrating with adrenaline. "The only way you're going to get me to relax in here any longer is if you drug me."