I'm not sure whether to worry about risking injuries or not.
On the one hand, he's a whole person jumping on the back of teammates who probably have all kinds of nagging little hurts that could be tweaked.
On the other hand, I remember Big Baby's incredulous "you were on my back?" in the post-game presser during the playoffs last year. Sure, Baby was on a huge adrenaline rush, and he's also big even by NBA standards, but he clearly had no idea whatsoever that Nate had even jumped on him.
But either way, Nate's performance was hilarious. I need some behind the scenes videos of what got said about that in the locker room.