Jimmy Roseman was enjoying a dive at Bethel Shoal, Florida, when he was attacked by a 12ft Great White. At 90ft deep, Roseman was horribly exposed with just a spear gun as a weapon. Jabbing frantically at the giant shark, he managed to drive it off briefly. Unfortunately the shark returned for another attack before the panicking diver finally managed to make a hurried break towards the surface and safety. The video was uploaded by Chris Saunders. Credit: YouTube/Chris Saunders