Well, in the first comic strip, I'd venture that if there actually was "zero gravity" in at least that part of the house, Yuna should have continued moving toward the controls of her anti-gravity generator. Why would she suddenly stop, when inertia should have kept her going until she hit an obstruction?
The second strip, wherein the girl actually does get maternally spanked by Ye Thuza, demonstrates the mindset of a pure scientist like Yuna, that her experiment has top priority--if her brother's action figures have to be sacrificed for that purpose, that's the price of scientific inquiry.
I'm not certain if she feels the same way about the 'price' being exacted on the seat of her pants (while occupied by her bottom) though...

--C.K.