They do that by skiing really fast s gold medal skier skiing in front of him saying jump, turn right, so forth.

以非常快的速度滑雪,世界冠军在他前面滑着，and，having，the，world’,不停地发出，起跳，右转，等口令。

7个颠覆你思想的演讲课程节选 : 斯坦福公开课