this video on youtube shows a girl that suffers a growth spurt until she becomes a giantess. She then examines the city at her new height before moving. While on her walk she steps on a little man only then to notice the tiny man and smile a sinister smile. She then starts to grow again until she towers above the whole city. The tiny man looks up at the giantess with fear as she lowers her foot and crushes a large part of the city leaving only a giant footprint where tiny building once were. She admires her work and then she starts to grow again until she is bigger then the clouds.
You can watch this video here Giantess Growth