Diver grabs huge great white shark by nose in the midst of an attack

Who blinked first? Incredible moment diver comes face-to-face with a giant great white shark before grabbing it by the nose to 'sedate it' - but is it all as it seems?

• The diver met a great white shark in Augusta, south of Perth.
• In an attempt to sedate the shark, the diver rubbed the animal's nose 
• Shark's noses are full of nerve endings, and rubbing is said to relax them