Charles Vanel performed his own stunts?!
Charles Vanel was sixty-one when this film came out. Not a young pup.
Director Clouzot really put him through the ringer:
I thought he was going to get a heart attack running after Mario in the truck. And when he was running alongside the moving truck he could have slipped and fallen underneath the dual rear axles.
Later he jumped off the truck. Did you see him run right into the camera?
And the oil pool scene: moving large branches and submerging himself in real crude oil! I read he (and Montand) developed conjunctivitis from this scene.
Pretty tough work for a sexagenarian!