The Doctor hopes that wasn't one of the semi-sentient life-forms mentioned in the briefing. Karis here could certainly learn some restraint before she goes kicking at flower-looking things or...yes. The Doctor tries to step in before Karis possibly commits more murder, really, really hoping those flowers weren't of the semi-sentient -- or worse, sentient -- variety.

"Then there's form and texture you can still appreciate. You're not blind, Karis," the Doctor remarks. It's not quite a scolding, except it is. The Doctor pulls off his tweed jacket, trying to edge her away from the closest flower by pointing in the opposite direction. "What do you make of that wall? Rather big to be purely decorative, I'd say."