Man dives 65ft deep into the ocean to prove one terrifying truth about the sea

Let’s be honest, the more you think about it, the scarier a place the ocean becomes.

And that’s not even starting on the reality of thalassophobia, but this certainly could trigger it.

In an attempt to prove one terrifying truth about the sea, a man dove a whopping 65 feet deep into the ocean.

There are some daredevils out there who go a whole lot further down in the name of extreme sport, as anyone who has watched The Deepest Breath on Netflix will know all too well.

It's a pretty haunting watch, but it sums up pretty clearly just how difficult it can be to get back to the surface.

The doc from 2023 focused on the tragedy that notoriously befell Alessia Zecchini and Stephen Keenan back in 2017.

They ran into trouble during a recreational dive across the Arch of the Blue Hole in the Red Sea, just north of Egypt – a popular spot for divers.

Keenan was a safety diver and had agreed to meet Zecchini at -50m, there to help if she ran out of oxygen when resurfacing. But for unknown reasons, Keenan was 20 seconds late with his dive as Zecchini swam astray to find her way up, getting lost.

He risked his life to save her, bringing her back to the surface, eventually paying the price as he passed away shortly after resurfacing, highlighting the dangers of the extreme sport.

And as people may wonder how it was such a struggle to resurface, a Reddit video put it into perspective.

The diver highlighted how dangerous free diving is as a sport (Reddit)

Diving up to a depth of -65ft (20m), which is equivalent to a six-storey building, he demonstrated how our body's buoyancy changes, the deeper it goes.

At the start of the clip, the free diver asked: "At what depth do I start sinking underwater?"

At -5m (-16ft), he shows that he was 'definitely floating', while at -10m (-32ft), he was still floating but 'a little less'.

He revealed that he was 'perfectly neutral' at -12m (-40ft), starting to sink at -15m (50ft) and 'definitely' sinking at -20m (-65ft).

But why and how does this happen?

It's all to do with physics - basically, when a diver reaches -10m, the pressure is double what it is at the surface, and this increases by one atmosphere every 10 metres, meaning that at the average ocean depth of 3,800m, the pressure on the sea floor is 380 times greater than at the surface.

This is called hydrostatic pressure.

But that's not all, density has a part to play, as the weight of our muscles and fat contributes to making us more dense than water.

The air in our lungs also becomes compressed as we go deeper, making us less buoyant, and as explained earlier through hydrostatic pressure, we become more negatively buoyant as we go deeper, meaning we descend quicker.

This diver's video gives social media users an insight into how dangerous free diving can be, and possibly how Stephen Keenan, a seasoned professional, could fall foul to the unforgiving conditions of the sport.