Manhole covers spotted bouncing up and down on Chinese road

This is the bizarre moment manhole covers were captured bouncing up and down on a road in northwestern China. In the video, shot in the city of Shangluo in Shaanxi Province on August 1, a couple of manhole covers bounced up and down repeatedly on a road, while vehicles drove past next to it. According to reports, the water pipe was being tested and the air pushed by the running water affected the manhole covers. The video was provided by local media with permission.