This, my friends, is what it looks like under a manufactured home that suffered a water damage leak.
These homes have strong tarps under them which will hold water. Lots of it. We've seen them stretched clear down on the ground. With the HVAC vents in the floors, they act like a drain system, but aren't water tight.
They have to be cut open to get the evaporating moisture out of the building and get wet insulation off the floors/joists.
When cut open the water really gushes out of these.
One has to be skilled to cut these open and be out of the way of the water. Unlike me, who misjudged this one and had the water and that pipe laying there come right at me. The pipe did hit me, but not hard.
Worst part was getting water down in the rubber boot. That thing still smells. Oh, oh, too much information.