That's truly awesome and creative.
It probably goes without saying that this is not something you should be trying at home - diving in overhead environments (such as under ice, caves or wrecks) is extremely hazardous.
If anyone's wondering how they're walking inverted on the underside of the ice, it's a pretty cool trick: They're wearing dry suits, you add a little air to the suit to become positively buoyant, invert, and let the bubble of air settle in your boots (which, BTW, can be terrifying and is a very good way to get bent or die at depth).
It probably goes without saying that this is not something you should be trying at home - diving in overhead environments (such as under ice, caves or wrecks) is extremely hazardous.
If anyone's wondering how they're walking inverted on the underside of the ice, it's a pretty cool trick: They're wearing dry suits, you add a little air to the suit to become positively buoyant, invert, and let the bubble of air settle in your boots (which, BTW, can be terrifying and is a very good way to get bent or die at depth).
