The cave, which is the deepest in the mountain range, consists of a complex system of passages and running water. This is also the biggest threat to the two climbers, says cave diver instructor Stefan Hogeborn, who visited the Morning Studio.

- It is no longer a cave exploration but a cave diving exploration. They are not prepared for this, he says, and refers to the fact that their equipment is not intended to be completely submerged for a long period of time.

You've talked about bursting in - what do you think about that?

- It might go. I remember when I was exploring the Sala Silver mine. We dived about 30 meters deep and all of a sudden it felt like the whole mine was collapsing. It turned out that they were blown up in a mine just over two kilometers away, but it felt like it was just above us. So blasting in will provide a terrifying experience for those in there.