Octavi Serra, Iago Buceta & Mateu Targa, 2015, street art festival "Ús Barcelona".
https://www.behance.net/gallery/26326511/Pneumatic
http://usbarcelona.com/en/ooss-iago-buceta/
http://www.designboom.com/art/pneumatic-octavi-serra-iago-buceta-mateu-targa-barcelona-05-17-2015/