In this video, a construction worker descends into a mud pool about 82 feet deep to salvage a pile hammer on a construction site in Guangzhou Province.
And this video shows a construction worker emerging from a mud pool on another construction site.
In China, these men are called “water ghosts,” and they are commonly found on construction sites for bridges or high-speed railways. During the act of piling — in which heavy stakes or posts to support the foundations of a superstructure are installed — the tools that are used often fall into a hole filled with muddy water. “Water ghosts” find the lost tools to continue production.