I wanted to practice dream combat.

Okay, so first I was in a restroom of some sort; I think I was in a public place such as a hospital. I looked in the mirror and my hair was short instead of long, so I became lucid.

I went through the door of the restroom, and emerged into the atrium of my school (a very large meeting area sort of thing). I summoned one of my classmates, extremely randomly and not caring who appeared. At least a real classmate appeared and not a made-up one.

I managed to control her; she began walking towards me and tried to punch me. I ducked; it was almost slow-mo, and then punched her back. It carried on like this for a few minutes, until the dream faded.

Making DCs do certain things is so cool; it makes it easy to plot a storyline in your dream.