It was during this time that the entire sport of ski jumping underwent a significant transition in technique. Until the early 1990s nearly all athletes used the parallel style (or Däscher technique), in which the skis are held close together and parallel to each other. This had been the norm since the 1950s; Matti Nykänen created a variation in the 1980s with the skis pointed diagonally to the side in a crude attempt to increase surface area, yielding more distance. However, this came largely at the expense of stability and balance, akin to 'walking a tightrope' in mid-air and leaving athletes at the mercy of the elements. Akimoto, Findeisen, Berg, and Goldberger's accidents were all caused by unpredictable gusts of wind that made them lose control at the highest and fastest stage of their jumps, exacerbated by an outdated technique ill-suited to the new extremes of ski flying, as well as the prevalence of older hills featuring very steep slopes.