When rodeo riders invaded Hollywood, they brought a battery of rodeo techniques that Canutt would expand and improve, including horse falls and wagon wrecks, along with the harnesses and cable rigs to make the stunts foolproof and safe. Among the new safety devices was the 'L' stirrup, which allowed a man to fall off a horse without getting hung in the stirrup. Canutt also developed cabling and equipment to cause spectacular wagon crashes, while releasing the team, all on the same spot every time. Safety methods such as these saved film-makers time and money and prevented accidents and injury to performers. One of Yakima's inventions was the 'Running W' stunt, bringing down a horse at the gallop by attaching a wire, anchored to the ground, to its fetlocks and launching the rider forward spectacularly. This either killed the horse, or rendered it badly shaken and unusable for the rest of the day. The 'Running W' is now banned and has been replaced with the falling-horse technique. It is believed that the last time it was used was on the 1983 Iraqi film "Clash of Loyalties" when British actor and friend of Yak Marc Sinden and stuntman Ken Buckle (who had been trained by Canutt) performed the stunt three times during a cavalry charge sequence.