Last week in Australia, one man's day at beach could have turned into a disaster: He was attacked by a seven-foot bronze whaler shark while surfing about 100 yards out from Sydney's Bronte Beach.Fortunately, the man, Simon Letch, stayed calm and "shoved the board at [the shark] like a barge pole." After taking two bites of the fiberglass board, the shark swam away and Letch surfed back to shore."It was only about 10 or 15 seconds that I was waiting for a wave but it seemed like an eternity," Let.