I don't know, [He says, honestly.] But if Iris is worried enough to pass out oxygen masks and bring out her paradoxical public transit, then I'm willing to take the precaution.

Besides, even if we do make it without incident, you never know when something like this will come in handy! Air is great, Shiro, really great. You don't appreciate a healthy, well-balanced air supply until it's gone.

[He is speaking from so much personal experience.]