Majlis al Jinn is a huge cave located in Oman and it's an epic challenge for the climbers Stefan Glowacz and Chris Sharma. After a 170 m free hanging descent, they climb back into the light together from the deepest point of the cave. While ascending, they not only have to harness all their physical and mental strength, but they also have to fight gravity, as they hang upside down from the roof of this enormous natural wonder.