twisted risers We read in a recent APF News-Sheet of yet another hard cutaway experienced by an Australian skydiver. It prompted me to dig out a still very relevant article from the archives. Several years ago, there occurred a rash of hard/impossible pulls on cutaway systems, prompting John Sherman to conduct a series of experiments in May 2003 to accurately define the problem. John has written several definitive papers on riser construction and 3-Ring technology. In one of