My pyramid climbing days are over, but this does look interesting.
I went to Egypt aboard the USS JFK back in the Seventies, and took a trip to the pyramids. You could still climb them back then, and I remember climbing up a few levels of blocks and thinking “This is crazy!” They were kind of crumbly looking, and I recall thinking if you slipped, there was no stopping you, and it was going to be a long way down even from where I was, so I didn’t go up any further.
I heard a sailor on a subsequent trip there did get badly injured or killed when he fell, and they prohibited it for sailors.
Nowadays, I don’t think anyone is allowed to climb.