Pics like this seem to be of varying quality as a result of more photographers now sticking the camera into the pool on the end of a pole to capture the individual action of the swimmers.
Unknown (with complicated water reflection):
http://24.media.tumblr.com/ae631c934...5lxo1_1280.jpg
US swim champion Nathan Adrian (but strange camerawork):
http://24.media.tumblr.com/06eaa9518...c36fo4_400.gif