Ouch!

"Peter O'Toole was often injured during filming. He received third-degree burns, sprained both ankles, torn ligaments in both his hip and thigh, broken his thumb, dislocated his spine, fractured his skull, was bitten by a camel, sprained his neck, tore a groin muscle, and was concussed twice. He also seriously injured his hand during filming by punching through the window of a caravan while drunk. A brace or bandage can be seen on his left thumb during the first train attack scene, presumably due to this incident."

Well, nobody can say the man didn't work for his money!