Ever wonder why the All Blacks dominate the rugby landscape?
The answer is simple enough - they start them young, and even at school their players are as hard as nails.
Take the clip above as proof - Ruslan Casey of Wanganui Collegiate School puts in one of the hardest hits you're ever likely to see in any rugby, let alone school level.
And no less impressive than the hit is the response from the St Paul's Collegiate School opposition.
Not only do they run in the try regardless (we'll forgive you if you didn't spot that the first time around) but the player tackled, despite the painful-looking snap of the head, gets up and walks away from the huge hit.