Cities in the Astral

In a lucid dream there was a very fun bit where I summoned a big river rafting innertube and sat in it and floated like levitation about two feet off the ground and used it to get around the dark city streets. I just decide which way to go and floated there as if I was on a river. I had listened to Huckleberry Finn that day so the idea of leisurely floating along appealed to me. At one point I am dreamily floating at night down a lonely neighborhood street and I hear footfalls coming from behind me kind like from a jogger. I turn and it is a young female jogger. She looks worried about me. I decide not to allow that thought to flavor the dream. I decide if I ignore her and go about my business it will put her at ease. I can hear her jogging along beside me and start talking with her. We go on a short adventure together and travel under a mountain through a tunnel the whole time her jogging and me floating along leisurely in my tube. I remember pointing out to her that the graphics in the tunnel made no sense when we went down a staircase. It looked to me that I was floating both only a foot off the stairs and a about two feet below the ceiling, that would make the tunnel no more than 4 feet high, yet she looked about normal height and had a few feet above her head.