If you suffer from claustrophobia, you might want to give this clip a miss:

Caveman Hikes is a YouTube channel run by uncle and nephew team Jacob and Calvin Sanders.

Now, there is plenty of pulse-racing footage of people caving knocking about on the web, but the Sanders’ videos are among the most extreme.

The daring duo have tons of nightmare-fuel on their YouTube channel, generally tempting fate with impossibly small squeezes and raising viewers’ blood pressure.

Jacob told the Guardian in 2022: “When I first went in caves, I was terrified.

“Caves will always surprise me. Is it going to be wet? Is it going to be dry? Is it going to be cold, dirty, muddy, clean?

“Is it going to be, like, pretty or is it going to be super ugly, you know, like a crawly cave that’s all spiky?”

One of the pair’s videos is making people nauseous with anxiety, showing Calvin ripping his clothes to shreds trying to squeeze through a narrow cavern.

He says in the video while in a particular dicey spot: “A lot of people ask why we do this and you’re never going to get a sufficient answer.

“Why do wake up in the morning? What drives you? What makes you want to get up and study a subject or go to work or go hang out with your friends?

“Really, nothing. That’s just life. Really this is our way of living, it is not our way of dying. It is our way of destroying shirts, but our bodies are just fine.”

The video – shared in 2022 – explains that the brave pair and their team were trying to map a new cave they’d discovered, meaning they could be faced with all sorts of unexpected obstacles.