Action movies, as they exist today, would not be the same without a mistake made by a special effects team in the 1960s in the samurai movie Sanjuro.

While it was meant to be a powerful scene, the blood geyser effect went awry during filming. Tatsuya Nakadai was equipped with a hose beneath his costume, pressurized with 30 pounds to simulate bleeding. But during the duel scene, a connection in the hose failed, causing all the fake blood to burst out in one sudden, massive spurt instead of the intended gradual flow. https://video.twimg.com/amplify_video/1851176263320231936/vid/avc1/648x472/sxrjEoSbWfsFYxYp.mp4?tag=16