Pumping revolvers is dangerous

I saw on contest a duelist shooter drawing is first revolver, shooting 5 times, keeping in hand, then drawing his second one to continue. But he pulled his first empty revolver back toward him and he really engaged his second arm with this pistol. We supposed the first pistol is empty, but in my opinion, it's dangerous. I had pictures of that... What is the rule and the penalty for that ? Same situation is knowed for gunfighter "pumping" his pistols to cock alternatively them.

As requested (excerpts from a related email conversation): The "unsafe position" is actually IF the muzzle of a loaded and/or cocked revolver covers the other hand. If there is sufficient lateral spacing between the hands/arms/pistols, the fact that the muzzle of one revolver might "technically" be behind the opposite hand is NOT a major concern. There IS if the shooter is crossing over one revolver with the other while actively engaging targets with both at the same time. Same as if a D