There's an old Italian phrase I like, to describe especially daring circus performers. they do the salto mortale. It means they do a somersault, on a tightrope, without a net.

意大利有一句俗语我非常喜欢，是用来描述最大胆的马戏演员的：他们在玩命。它的意思是说，他们在钢丝上翻筋斗，而下面却没有设置安全网。