James puts on the black mask and then he turns around and the mask is blue again. The opening scene with the Aston is filmed at Silverstone. You can see the Stowe grandstands in the background. He's very specific about this number. He either had gills implanted or can fight while holding his breath for enormously long periods of time.
Largo gets the gate opened to allow sharks into the pool.
When they were shooting this, there was supposed to be a sheet of glass in the water with the sharks on one side, and Sean on the other. Unfortunately, a couple of the sharks got round it and when Sean opens the door to go through to the other pool, he's nose to nose. At this point he's not acting. Watch his face for the genuine look of horror. During the underwater fight scene at the end, Largo does not have his eye patch on under his diving mask, but when he comes onto the Disco Volante he has his mask on his forehead with the eye patch underneath.