When on a rampage most giantesses just destroy a city and not look back once it is done. This giantess however likes to have a wonder around the city and take in the nice view of the city before she destroys it. When she has had a good look round the city she gets to work and starts smashing buildings and stepping on cars and people. If she likes a city she will take a tiny person as a memento but in this case the tiny person she wanted was stuck inside a car so instead of having the trouble of taking the little person out of the car she just took the car with her so she could try and take the tiny person out once she had finished destroying the city.
