《徐霞客游记·粤西游日记九》
于是挺身采用这个方法，如钻出水井那样，都是横向绷紧竖直向上耸动，不必靠梯子台阶了。
遂耸身从之，如透井者然，皆横绷竖耸，不缘梯级也。
So I stretched myself and used this method. Just like drilling out of a water well, I stretched horizontally and moved vertically upward, without the need for ladders or steps.