http://www.nbc4.tv/news/2415988/detail.html
Although shark attacks are very, very rare, this attack in central California coast is alarming because according to the story the woman was in a wetsuit hanging out with seals. When the seals suddenly hauled ass she didn't get it and a shark nailed her.
Sharks move FAST in water. If you can see a fin over 50 yards away it can get to you in around 2 to 4 seconds. When they hit you it's like being hit by a truck.