This video on youtube shows a scientist rushing back to his lab. While he is running he is holding a tiny woman making sure she gets there safe and sound. When the scientist gets back to his lab he places the tiny woman on a platform and pulls a leaver making the tiny woman grow into a huge giantess causing her to burst out of the building she is in. When she stops growing she finds out that she has reduced the lab to rubble. Soon The tiny scientist emerges from the rubble completely unharmed. When he looks up at the giantess he is amazed on how big she had gotten but the giantess isn’t happy and blames the scientist. When the scientist tries to explain what happened she just crushes him under her foot.
You can watch this video here Massive Giantess Anime.