Black for three minutes means that at the last minute, what is already a foregone conclusion is completely reversed. According to the information on the Green Model website, the moment of life and death is really short, but three minutes of darkness can also be very long. As the manager of the production team, I was deeply touched by the accident warning education film "Three Minutes in Black, a Moment of Life and Death". All the bloody accidents in educational films remind us that nothing is worth mentioning in the face of safety. We should learn from other people's accidents, put an end to fluky psychology, put an end to illegal operations, make safety a habit and blend into our blood, so as to ensure all production.