Scary Job of JCB, Doosan, and Sany Excavators Felling Trees for Mountain Road Construction In this video, we can see a JCB excavator, a Hyundai excavator, and a Sany excavator struggling with mountain road construction, All the excavators are felling trees that come in the way of mountain road construction. With a great effort, they successfully fell the trees. After that, they are there to cut the hillside so that they can make a mountain road.