I'm a couple weeks late on this, but recently Jake Brown landed the first ever ollie 720.  To put that in layman's terms, he did two full rotations without holding the board on his feet with his hands.  Check it out:

 

 

So this seems crazy.  How did he do that?  How did he keep the board on his feet?  Magnets?  It turns out, it's actually very simple physics:

The Conservation of Energy

 

That's it!  Jake Brown doesn't really have to do anything because the conservation of energy won't be violated (it's a law!).  So yeah, thanks physics!  Skateboarding is so easy.