This video on youtube shows a girl growing to gigantic size. When she stops growing she become very anger and upset so she starts to go on a rampage taking her anger out on a nearby building. She starts by picking up a tree revealing a spell circle where the tree was. She then uses the tree to destroy the building. Suddenly she starts to cry as she fears she may not be normal size again just then she drops the tree and uses her hands and feet to destroy the building becoming increasingly upset as she does. When she has destroyed the building her friends tries to calm he down but the giantess doesn’t listen and jumps over her and starts to run away destroying houses in her path.
You can watch this video here giantess anime