In reply to FrogHero:
> Nice to see the route hasn't fallen down yet, I've been expecting the news of Main Wall's collapse for almost 30 years.
We recently visited during a showery spell and I was keen after reading the guidebook to get on Major Tom. I got to the base of the route and stared at it for quite some time, trying to balance in my mind two seemingly obvious but opposing facts:
1) The whole wall is several thousand tons of Jenga magically levitating despite the two inch cracks all the way around all the blocks in every dimension. I couldn't understand what was holding them up, everywhere I looked for some supporting structure there seemed to be a hollow void bar a few sandy flakes at the bottom.
2) The routes are covered in chalk where everyone has climbed up and pulled hard on said hollow crappy flakes (that look to be the keystones stopping a whole cliff collapsing on your head) and yet the cliff hasn't actually fallen down despite forty or so years of such seemingly suicidal recklessness.
In the end I couldn't bring myself to get on the route, which is a shame because assuming the top bit didn't actually bury you while you pulled on the bottom bit it did look quite good, but it did bring about an interesting reflection on perceived risk and group-think.