Two swimmers say they survived separate shark attacks over the past few days by punching the beast in the head.
Scott Stephens said a great white pulled him underwater Tuesday at a popular surf spot off the coast of Eureka and let him go only after receiving the blows.
Doctors say Stephens suffered lacerations, but none of his vital organs were damaged.
Mariko Haugen said she was swimming with her husband off Maui, Hawaii, over the weekend when she encountered a tiger shark.
She says her martial arts training prepared her and she punched it twice.
Haugen was not bitten but did require stitches for some scratches.