"Wait--!" Devero makes a grab for them, but too late.

The boots shoot up out of Koumyou's lap, bang into the ceiling of the cabin, then rebound. They don't fall back to the floor, though, oh no. Instead they bounce between floor and ceiling like a pendulum winding down, smaller and smaller movements until the pair comes to a stop, hovering in the air in the middle of the room.

They're trembling slightly. There's an audible hum.

...Devero probably should have anticipated that would happen.