See, the idea of them sneaking out of here unnoticed? Minako could deal with that. Possibly. Maybe. With just a tad of guilt.

But the idea of making stuff look invisible..

"We can't just do that," she whispers back to the other girl. "What if someone trips over something, because the floor is broken and they can't see that it's broken? We could seriously hurt someone that way!" Even if it would also be very accidental. But Minako can't excuse that part to herself.