Andrew remembers coming back from his first split with a sore neck after the Master portion of James had held one of him up by it. He doesn't like to remember, but he doesn't expect merging to cure all his ills...though at least being in a bigger body will make him easier to treat.

He sniffs in a big breath and lets it out in a sigh. "You'll explain later," he surmises, smiling at some private joke as he waves a hand at her. To Secret he raises an eyebrow, then nods. "Go to TARDIS," he agrees. "But I can't move my leg." It's only a slight exaggeration at this point.