It was probably kind of sad how Sparkle was actually proud of himself for not wincing at that thump. And hearing Atton calling his name after it was okay, too. Or, at least, it didn't immediately make his guts do backflips or anything. That, too, was improvement.

"Bathroom," he called back, after grasping the fact that Atton was probably also expecting a reply. "S'okay, 'm decent."

Just in a bathtub without water, fully clothed. As you do.