[He's a little caught off guard by the sudden intensity but-]

I dunno. Never felt like this before? Like... [Think, Leo, think through the groggy haze. He shifts a little before his jaw clenches and he remembers to breathe.] Uncomfortable like this, but... Earlier, sitting up hurt. Like my shell wasn't sitting right.

[And now that he's saying it out loud, putting words to the feeling, it's a creeping anxiety under his skin. He's never felt anything like that before.]