Originally Posted by Brain Damage
I'm curious about this.
I don't think this is the case simply because when Batman says: "Who said anything about stopping it," Ra's looks up in surprise, the camera cuts to the broken controls and then back to his surprised reaction.
I think it's in reference to the back up plan of blowing the tracks. Ra's smashed the brakes, but Batman keeps on fighting. Ra's is under the assumption that Batman is still trying to stop the train.