It's a bit like that Blue Peter footage from the 70's of John Noakes climbing up Nelson's Column on wooden ladders lashed together with baler twine and wearing a pair of slip-ons and an old army jacket.
I saw this video and thought, "thats pretty dangerous".
There's always a chance to die (sounds like a Bond movie), but sometimes people do stuff that increase that chance a lot.
I have no examples from my own life that I can think of right now but I know there is a certain feeling in the body when you are at risk, the "shit if I **** up here I'm gonna die myself to death here" feeling. Its similar to the "near death" experience but not necessarily the same.
Over to you.