A guest on the Joe Rogan Experience who once lived at the bottom of the ocean has revealed the scariest thing he saw underwater.
Rogan has worked with the UFC since 1997, initially as an interviewer and, over the years, has become one of the most recognisable voices in the sport.
The 58-year-old has developed a close friendship with UFC President Dana White and is now one of the promotion's key commentators.
Away from the UFC, Rogan has become a household name through his hugely popular podcast series, The Joe Rogan Experience.
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It is currently the most popular podcast in the world, with Spotify signing a new deal worth up to $250 million last year with the podcast host.
The podcast has interviewed several major guests over the years, including President Donald Trump, businessman Elon Musk and singer Miley Cyrus.
But one of the most interesting came five years ago, when Rogan spoke with the former NASA astronaut Garrett Reisman.
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Reisman first went to space in 2008 and later worked for NASA as a senior engineer working on astronaut safety and mission assurance.
Reisman has also spent two weeks deep in the ocean, and Rogan asked him to recall the scariest moment of that expedition.
He said: "The scariest thing I saw was one night I was taking a dump.
"The way you do this: number one, you just pee in the pool, but if you have to go number two, you don't go into the pool.
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"Because you don't want to float in your pool, that's like Caddy Shack, you don't want that, right.
"You don't take a tank, you just take your mask and your fins.
Rogan then questioned whether you had to go to the toilet naked.
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Reisman replied: "You can, we had a mixed gender crew, so I wore some trunks.
"You just go down and you have to swim maybe 10 or 15 feet, it's not that far and there's what we call the gazebo, which is just a little dome that has air inside.
"Now you're out in the middle of the Atlantic Ocean with no tank, you're 60 feet down, it's night, you can't see a thing.
"But you can see this little gazebo, you swim to that, you pop in and then you got air, just some valves, you let in some fresh air.
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"And then you hold on and you take off your trunks and you just let it rip.
The 57-year-old American added: "But the problem is the fish get accustomed to this.
"As soon as you drop in the water at night, it's like the dinner bell going off and there's like a school because this is feeding time.
"The worst are the angelfish because their shape, they can get right up in there, it's not cool.
"So you take your fin off and you're whacking them."
James Taylor