Although many found the video humorous and entertaining, others warned that it hinted at a more alarming and sinister prognosis of life in stress-filled Hong Kong, particularly inside buses, nicknamed "flying cars of death" and other overcrowded areas. Lee Sing, director of the Hong Kong Mood Disorders Centre at the Chinese University of Hong Kong, warned that Hong Kong's high-stress working environments are spawning a city-full of "Bus Uncles". Lee estimated that one of every 50 Hongkongers suffers from intermittent explosive disorder, turning one into a "ticking time bomb" of rage and violence.