Quick sketch of an office building

In this video I did a very quick sketch of a building, actual sketch time in less than 30 minutes.
The main purpose of this sketch is to explore the expressive characteristics of a very rapid sketch, something that feels loose. You can notice that the sketch is by no means precise. Nevertheless, this type of architectural drawing adds interest to a presentation and feels human.
Besides, it is really fun to do this kind of drawings.
enjoy