 During the filming of the scene in which Tequila is running down the  exploding hallway with the baby, John Woo wasnt satisfied that the  explosions were big and frightening enough in the scene. According  to Woo in his Dragon Dynasty DVD interview, he asked the special  effects technicians to reset the explosives and give him the  trigger. When Chow Yun Fat ran down the hall, Woo immediately set  the explosives off, nearly incinerating Chow, who barely made it.  According to Woo, Chow exclaimed to the producer afterwards "Johns  trying to kill me! Johns trying to kill me!". When Woo heard Chow  screaming, he went up to apologize to Chow and saw that the back of  his head and coat were in fact singed from the explosions.