Why this trick should be IMPOSSIBLE ft. Rodney Mullen - Skateboarding Science

04:32
 "The reason why the mid axis is so hard to spin
 involves a lot of complicated math
 that all works out to define the intermediate axis theorem,
 which states that inherently. Spin about the intermediate axis in an object like this
 is always unstable.  So there it is. That's why flipping it is so hard."

so "the reason its so hard is because of this thing I'm not going to talk about that says it's hard"

wow. A+ science education right there. I understand perfectly now