They got overconfident. In hindsight Jumbo should have ridden defensively, but were induced mistakenly to go for the kill. After all it was Pog who had to attack, thus he should have been made to burn matches, with Vingo sitting on his wheel. Exactly the opposite of what happened. When Hindley dropped on the Tourmalet, Jumbo could have kept Kuss as the pacemaker to make Pog start the fireworks and have Vingeggard just follow, putting pressure on Tadej to have to drop him and not vice versa as was the case. Then when they catch Van Aert, use him only to pace back up to the break and then make Pog again have to try and drop Vingeggard on the finishing climb. Instead the mental blow Jumbo got will have rocked their certainly and cursed Vingo with inferiority doubts. Moral: Jumbo got outfoxed, however, and I've said this before, from the moment Vingo's pace allowed Kwait to breifly come back that's when he should have known the plan wasn't working and thought of a plan B. Instead he just played Pog's last domestique.