Today I saw a news story about a photographer from the Orlando Sentinel that got video footage of a spinner shark jumping out of the water off the coast of New Amyrna Beach in Florida with surfers all around.  Check out the video

The spinner shark (Carcharhinus brevipinna), similar to a black tip shark, isn't known for bothering humans, but according to the International Shark Attack File as of 2008 there have been 17 attacks (none fatal). Even knowing that though I'm sure it would be a little freaky to have a shark of that size jump out of the water a few yards away from where you were swimming or surfing.  Here is another video that shows how they jump out of the water at a slower speed:

The first time I saw the video I thought it was very interesting how they spin like that.  It reminded me of watching dolphins perform.  According to some research the spinner shark doesn't really have cutting teeth and they feed primarily on small bony fish.  Their method of feeding is to charge vertically through a school of small fish while spinning.  The fish are then swallowed whole.  This tactic can sometimes result in the shark jumping out of the water.