Check out a compilation of Unity-based skateboard moves by KevKev.
For those who don't know, KevKev is a Game Developer and the creator of the upcoming game Last Man Sitting. On the author's Twitter account there are many experiments on Unity and its capabilities. The "regular segment" that KevKev often posts is the recreation of common skateboard moves in Unity. And the results are absolutely fantastic. To do so, KevKev uses one big sphere and the Dreamteck Splines tool and then snap/lerp to the next spline point.
You can check out more of the developer's experiments down below.