Lucid Dream, floating in water

May 23, 2016, lucid dream:

In water, I’m drifting up to the surface of a river or stream. I look through the water enjoying the colors and as I rise slowly to the surface it takes a long time to get my head above water and then it clears up. As soon as I get a clear vision above water. I sink back down and I’m looking at a beautiful wall like image of crystal green and blue water. Then I think: “I’m Dreaming”. The wall changes into a pixel like representation and I think it will dissolve now but then it stays steady and I look at it in amazement. I know I’m holding my breath and start back for the surface but I won’t make it in time, I become frightened and sense that I might stay in this reality. Then I wake up just as I have to take a breath.