Such a simple concept, but executed masterfully by photographer Seth Casteel in this series of images that depicts dogs diving or swimming in water. I love dogs, as I'm sure most of you do, so you definitely want to give these a look.
Apparently this has gone pretty viral, and Seth's site might still be down. (I was having trouble accessing it when writing this) If it's available check out some of his work at LittleFriendsPhoto. Here is a link to a gallery of these dog images on facebook.