Lead actor Thomas Roach has the uncanny ability to make himself vomit, a talent childhood friend Benjamin Jung-Clarke wrote into the script knowing from the start, having written the role with Roach in mind.
Lead actor Thomas Roach could not see for a majority of the shoot. With the prosthetics on his face covering his eyes, he would spend the days in darkness and reports he felt isolated from the rest of the cast and crew on these days.
The shot of the Sun was all achieved in camera. Director Sam Curtain reports that he was inspired by the ending of THX-1138.