 Conrad knew a friend who had died from an epileptic seizure, so he talked to a doctor at Columbia Presbyterian Hospital's seizure clinic about the film.He was told that less than 0.01% of the population was affected and that prompting non-epileptic people with a warning could cause them to have "seizures".He was still concerned about legal liability after finding two cases in New York where theater owners had been sued after people suffered reactions from a frame rate of 16 frames per second.