It's been such a pleasure to collaborate with the 70 Anniversary of Castellers de Vilafranca, the best human tower team of all times, from my hometown. I usually talk about them in my talks so some of you who live abroad and met me already know what they mean to me. Nearly everyone in my hometown is involved in a way or another with them. Human towers talk about the power of the will, about how unity and teamwork makes us better human beings, and about how having faith in the impossible helps making things finally possible. The poster is an optical illusion and uses a visual paradox. It's a juxtaposition of two contradictory elements, the gravity against the power of the will. It's also a pattern, so you can get an army of feet and hands. Check their Instagram profile to see the impossible being achieved.