There's a bit of a pause in the stream of dialogue - or monologue, really, as the Doctor was telling them a story.

"Did they have ice planets there? Or candy floss?" April asks, all curiosity and surprisingly little fear or pain. She's still on the Doctor's lap (or, well, on his lap again, after giving him time to regain feeling in his legs), and seems to be pretty comfortable.

The Doctor's probably still taking advantage of the contact to keep her awareness of pain muted somewhat.