Voir Sadisflix. The Sharp End is an adrenaline-soaked journey up the world's most challenging walls: the French Alps, the Eiger, the Utah desert, the Diamond of Colorado, Indian Kashmir, Yosimite Granite, and the sandstone spires of the Czech Republic. Run-out routes, scary high-ball boulder problems, ice-covered alpine walls and all-or-nothing free-solo ascents will keep your palms perspiring.