Calligraphy compositions

What I enjoy the most about exploring the world of calligraphy, are the countless possibilities. Changing the tool, the script or the media, can produce unexpected and quite interesting results. 
Following the footsteps of Niels Shoe Meulman, I tried very big calligraphy on a rooftop with a broom; inspired by Ernesto Casciato, I tried making my own tools.