From BBC:

"An Australian grandmother has survived a shark attack by repeatedly punching and kicking the animal after it "ripped off" part of her body.

Surgeon Mark Flanagan said: "We can estimate that she lost about 40 per cent of her blood volume from the degree of shock that she had when she came in, and the fact that we required to give her several units of blood."

Mrs Trumbull said she was happy to be alive."

Shark Tunnel and Aquarium at Omaha Zoo, Nebraska.