Can we find out who this guy is and what area he lives in? If the SLAP detectives got on it, he could easily be reported to CPS and arrested, while the kid can be somewhere safe from a monster who throughs children off what are essentially 12 foot tall cliffs.
FUCK that guy. If he's willing to do that while on camera, imagine what a piece of shit he is when its off. Seriously slappers, lets get justice for the piece of shit who beats up on his own child. And if legal justice doesn't work and he's local enough, tie him up and throw him off a damn cliff.
And whoever said "he needs to learn to fall." No he doesn't. He only needs to learn to fall if he WANTS to skate or he WANTS to try burly shit. There is no rule that if you want to be a skateboarder, that you need to be ready for your father to throw you off a vert ramp while you aren't even rolling. Just NO. The man is subhuman, and anybody who backs him likely has no soul.