[Ahaha, it's always the same. Ochako giggles and makes sure he doesn't go any higher than maybe a foot or so - she can control, sometimes, how high something goes, but outside factors like wind and inertia overwrite that. After a moment, Ochako presses her fingerpads together and utters a soft "release!" and he will thump back that one foot to the ground again.]

It's my quirk!! Eh, ah...s-superpower, I guess is the best describer, sorry...force of habit. [A quirk is a quirk in her world, that's just the term for it globally.] Anything I touch, so long as it's not held down somehow, or too heavy, I can make it weightless, and float, by removing its gravity. And it won't come down until I release it, either, ehehe...o-or unless I get too sick.

The, eh...the side-effect of overuse is nausea...and vomiting.