 Kubrick, Stanley (qv), known for his compulsiveness and numerous  retakes, got the difficult shot of blood pouring from the elevators  in only three takes. This would be remarkable if it werent for the  fact that the shot took nine days to set up; every time the doors  opened and the blood poured out, Kubrick would say, "It doesnt look  like blood." They had tried shooting that scene for an entire year.