Real-Life Aquaman Shows How He Can Breathe Underwater

This is a real-life Aquaman who claims he can breathe underwater and is even trying to teach people how to do it:

We should probably issue a warning at this stage - this guy is a professional freediver and you probably shouldn't try what he's doing at home (in a bath or pool, if you've got one).

Stephen Alexander is trying to squash any theories that he's cheating and can't actually breathe underwater - like he says he can.

When one of his doubters told him to 'use smaller goggles' that don't cover his nose, the h2o enthusiast decided to 'prove' that he's not using any sneaky tricks.

In one of his videos, he wrote: "A lot of you don't believe I breathe underwater because I wear goggles. So here's proof that I'm converting the water into oxygen."

Stephen then seemingly takes a big breath (underwater) before the water drains from his goggles... I'm not sure what's going on here.

He adds: "It's full of water but I fill it up with air."

He went on to explain: "They say the people of the lost city of Atlantis did this to live underwater," before asking: "Who wants to learn to do this?"

In an explainer video, Stephen says: "This is how I breathe underwater and it's honestly a lot easier than you would think. First thing you need to do is activate your diving reflex."

Activate your what now? Is this a button somewhere on our body we've not yet discovered? Apparently not.

Stephen goes on: "This gets activated when your eyes and nose get submerged in water." OH.

"By activating this, it'll lower your oxygen consumption. After that you're going to take in a mouthful of water then you're going to start pressurising your mouth by doing a clicking noise with your tongue."

He goes on to make a sound which seems to be his tongue touching the roof of his mouth over and over...

He then reveals what the mouth click actually does: "This separates the oxygen from the hydrogen. And the last thing you need to do is get rid of the hydrogen.

"To do that all you need to do is blow out some bubbles."

Tell you what, it's a good job there's only a shower in my gaff or I'd be dead in 10 minutes from now.