Fear. It has the ability to cripple, both in sport and in life. I’ve peered over the edge at Teahupo’o and it’s terrifying. With so much water draining off the reef it feels like you’re standing on top of a stationary wave. You wish the water wasn’t so clear. That might save you from having to look down and see the coral heads lurking beneath like a blade wielding thug in a dark alley.