Death Slide- Martin of Holland drawings - RIDING THE MARE OF STEEL

[gladiatoratticus]

This is a drawing by an  artist who called himself Martin of Holland.  I remember a scene like this from an older movie. I believe Yul Brynner played an Asian warlord who was showing a Western commander how loyal his troops were. He ordered one of his men to slide down this thing. The warrior laid chest-down on something like a large skateboard and took the ride. The board stopped partway down and the warrior kept going along the blade. This would be the fate of the Westerners if they took on his army and lost.

Does anyone know the name of this movie?