Cities in the Astral

LD#2: I find myself at the university I attended in my 20's. Having no reason to believe I should be there I become lucid. What to do? I walk around a bit to see what the subconcious may stir up. There seems to be a commotion in a locker room, and a bunch of DCs are trying to get in there. A man looks at me and seems like he is considering something about me. I focus energy at him to make the rest of the crowd focus on him instead (no idea why I did that). I decide the whole scene looks cluttered and uninteresting so I turn around and look for something else to do. I see a room for martial arts. Hmmm, maybe some sparring or rolling on the mats could be worth doing. I go in the door and become fully lucid. I realize that the 3 men in martial arts outfits may be 'real' entities, but I am not completely sure. Everything is extra clear and no odd distractions are happening. I ask if I can join. Sure. The instructor is giving us a small lecture on something to do with hands. He goes on for a bit, but what ever he is teaching has something to do with other dimensional grids and who to do something involving them with your hands.
I can not understand the topic well at all, so I excuss myself and ask if I can just do rolls or something if they wont be sparring. I take a big leaping role across the mat and it is all slo-mo and weird like the Matrix scenes. I loose lucidity and recall at that point. Duration~5 minutes.