It doesn't look all that extreeeeme to me. Fun yes!
For extreme maybe I should get a gopro and take the Windrush 14 down to the surf again? Last time we had 15-20 onshore with 1m swell. Hard to get out the back and we did have a nasty capsize. My son had an absolute ball and I bet$50 in his version the waves were 10m!
Associated video.
I want to find this place called "Slitsville". 
