Best lucid so far

So, my dream started with me and two of my cousins in a grey, concrete room. There was a little swimming pool in it. The water was very pale blue. I thought it was a pity that it wasn't bigger. Then I realised I was dreaming! I turned around and told my two cousins this. They just said 'cool' like it was no big deal. Then I stretched my arm forward and the pool stretched out! I stretched and widened it, untill it looked like a pool used for olympic divers.
I was going to do a bunch of cool dives, when somebody complained about the TV and I was ripped from my lucidity.

This is my first lucid dream where I've actually taken advantage of it. It sucks that I got distracted, though! Gotta work on concentration.