Pro surfer Shaun Tomson knows a thing or two about riding big waves — he’s been doing it since the 1970s — so woe is he who ignores this living legend’s advice on surfing’s proverbial proving grounds, Pipeline. The unforgiving barrels on Oahu’s North Shore have claimed their fair share of pros, wannabes, and straight-up dumbasses. Listen to Tomson, and think twice before heading into big-wave territory.