This dog was walking on water!!

I couldn't believe it, when I went to the lake to take a picture of the ducks, a man was standing on the shore and through a stick into the lake. His dog jumped into the water to retrieve the stick. But, he was not swimming, he was running on top of the water! I had to look twice. I quickly started taking a few shots of him, some of which are a little out of focus.
I couldn't understand how this was possible! It was not until a few minutes later, when they were getting ready to leave, that I realized it was a small sand bar the dog was running on!
For a few minutes, I thought I was loosing it! :)