Bystander captures harrowing video of sudden shark attack on surfer — here's what happened

Bystander captures harrowing video of sudden shark attack on surfer — here's what happened

A TikTok video posted by The Advertiser (@the.tiser) has stunned viewers, showing the moment a surfer at Kangaroo Island in South Australia was suddenly attacked by a shark.  Filmed from the beach, the clip captures a bystander's shocked "Oh s***" as the animal thrashes at the back of the surfer's board at D'Estrees Bay, a stretch locals call "The Sewer."  The man, in his 50s, was bitten twice on the leg, while nearby seals can be seen leaping t…