"Fever" by D3lta, was written specifically for the end credits. Musician Roberto Koustas, who appears briefly in the film, is a close friend of the director.
During the climactic military-base sequence, Stefanos Sitaras sat directly below a CH-47F Chinook helicopter, aiming an Arri Alexa Mini directly at the aircraft, taking in the full force of the tandem rotors. He suffered severe bruising in his chest and upper abdomen. He was briefly detained by military authorities and hospitalized for his injuries.
Stefanos Sitaras and two cast members were arrested during the Firemen sequence, and were detained for 4 days at the Police Department of Cholargos, in Athens. The crew was filming with three cameras at the mountain of Hymettus, and used a public power bank nearby to charge their equipment. Stefanos Sitaras was tried in September 2017 and found guilty of "electricity theft," for which he was fined 0.8EUR (the equivalent of power that was stolen).
On the first day of filming, one of two cameras was stolen from set. This is why the opening car scene is only shown from one angle.
The entire cast are entirely non-actors, who play themselves with their real names, and almost every scene is a re-enactment of a real-life situation.