Complex sentence: The term comes from a story about the climber Gaston Rebuffat who apparently climbed several difficult cracks in Europe using this hand position--normally in cracks hands or fingers--or any part of the body that fits--are jammed in the crack to hold oneself.
Split into simpler sentences: The term comes from a story about the climber Gaston Rebuffat who apparently climbed several difficult cracks in Europe using this hand position. Normally cracks are climbed by jamming hands or fingers--or any part of the body that fits--in the crack to hold oneself.