It’s quite common that giantesses get easily bored. They constantly need something to entertain them. They often behave like children who are quite picky when concerning their toys.
This giantess is exactly that kind. She didn’t stop destroying the whole city while stomping around to find the toys she like. Finally she picked two little buses but what’s done is done.
The damages she caused were just tremendously big. Poor little people…
Credit to nandix