[Bucky lets out a short sigh of genuine, blinding relief - it's only short because he realizes he needs to focus and keep Scott focused, too, that just because there isn't anything there doesn't mean he's out of the woods, yet.]

There's no one there, pal, you're safe. [Safer than the alternative, anyway.] You're doing really good, you're just gonna have to hold on a little longer for me, alright? Think about how much air you are getting in.