It's like rebuilding the Earth. Circle of life.
Van turns into a reef, fish congregate, young are spawned, larger fish come to feed on smaller fish, then fishermen arrive to catch them, then housing builds up around the van-reef ecosystem to house the fishermen, the fishermen have children, those kids need a skateboard park so they won't hassle other people, other people say "Heck, let's build them an indoor pool" and they do, then another van crashes into the indoor pool and there you go... circle of life.