lucid dream "time holes" (i.e. slow motion)
So, I wake up, sort of groggy, go back to sleep. I gradually realize I'm lucid and find myself in an old house that I used to live in when I was 14 or 15 (I'm 20 now). I look around and try mentally to keep the dream clear by paying attention, I don't want to drift off and lose lucidity. I'm doing this as I begin to head downstairs, toward the basement. I then think, well why not make the most of this freak lucid dream, and get laid. So I keep walking downstairs, telling myself that a girl will be in the basement waiting to have sex with me. I think of the first girl that comes to mind, some girl from my old highschool, and continue to walk down.
But something very weird happened. As I began to walk down the stairs, I began to move in slow motion. It was like time was slowing down, I wasn't able to go all the way down the stairs. Very strange.
This isn't the first time something similar has happened, time slowing or me being unable to speak, or being paralyzed, or slowly falling, unable to maintain a conversation with someone.
Any thoughts on this? I would like to not have such experiences, maybe understand their cause, or solution...