Corbet's, in the resort of Jackson Hole, has a worldwide reputation as the run that every hard-core skier must do once in a lifetime. It is easily reached from the top of the new cable-car up Rendezvous Mountain. More people come to look than leap and it usually takes several visits before you pluck up the courage. The run does not actually exceed an angle of 40 degrees and is a comfortable 15m (49ft) wide – a piece of cake, relatively speaking. The terror lies entirely in the start.