Not being tech trained, I have never been that deep and can't claim to know the ins and outs of it. However, do we know what training these guys had? The film has been edited and so we don't know the total time spent on this dive or much about any decompression they may have done, what gas they were breathing etc. They appear to have nitrox as their second tank, presumably for deco purposes? I tried to read the details on the computer, but couldn't clearly see much other than the total depth which he was obviously showing off.

I'm curious to know what the obvious deep diving errors were from the film. Don't need a 5 page dissertation, but a few bullet points might be interesting.