Being a senior skateboarder, I have gone through such situations so many times in my skateboarding career. There can be some major reasons for this failure. Here are these: 1- The surface you are riding might have a bending area on the left 2- The wheels or the trucks can be loosened or not attached professionally 3- Your style and level of riding the skateboard are not up to the mark. 4- You have an inappropriate skateboard and its components 5- Or you are riding the skateboard with the wrong setup