Eleven climbers appeared to have died on the world's second highest mountain K2.

It was one of the deadliest days in mountaineering history.

Rock falls, avalanches.

Huge pieces of ice. All are big enough to kill you.

He just flew out into Devoid and he was gone.

How did it all go so wrong?

And is it really worth risking death to feel alive? Why would

somebody pay to go to a place called the death cell on a vacation? Extreme, peak danger. With me,

Natalia Melman Petrazella. Listen to the full series now. First on BBC Sounds. BBC Sounds, music, radio, podcasts.

I'm not sure I've ever started a ramblings by putting on extra kit.

I mean, other than your traditional, you know, waterproofs, walking boots, walking poles sometimes.

But this is a contraption that is essentially a bungee rope and a stirrup

julia that's that's the unique bit about it is walking resistance bands okay okay so i'll show you here

so i'm going to be a bossy teacher now, which I am.

The PE teacher in you coming out.

So you put it, you've done that, which is great.

And then you hold onto the hard nylon bit and angle it out to the outside of your foot.

So that's it.

And then you put it underneath and put that one.

So it's smooth and it fits around my sock

and then I can do my boots up over the top of it.

It sits comfortably underneath the arch of your foot

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