Harrowing footage shows a foil surfer being pursued by a great white shark for miles along the California coast. Ron Takeda and Tavis Boise were on a 20-mile downwind foil run between UC Santa Barbara and Carpinteria on Saturday when a shark approached Takeda and began trailing him within inches of his feet. Hydrofoil boards are surfboard-like devices fitted with underwater wings that generate lift, allowing riders to glide above the water and travel long distances with reduced drag. A video posted on YouTube shows Boise holding a selfie stick and filming their foil run, with Takeda following behind. During the run, a 10 to 11-foot-long great white shark began tracking Takeda closely, appearing to engage in what Boise later described as a “cat and mouse” pursuit. The footage captures the moment the surfers realize the danger, with Boise shouting warnings to his friend: “Don’t fall,” and “Don’t stop.…