Flash Fiction: A lesson (and class) in brevity

I took a flash fiction class this last semester, and aside from being really interesting and fun, I found a way to write fiction, somthing I've never succeeded at before. I think writing longer fiction taxes my imagination too much--as a nonfiction writer, I'm not used to having to make things up. Well, not used to making everything up. It was the same in theater, actually. So long as I had a script, I could improvise. If someone said, "Make up something," I was completely at a loss.

So it goes with writing. Someone tells me to make up a story with characters and plot and development and scene and setting, I'm stuck. But ask me to write just a scene with one interesting character who does something unexpected, I can tell a whole story, and enjoy it too. So I'm going to post over the next little while the pieces of flash fiction I wrote this semester, and I'd very much appreciate any feedback. Though I can do this kind of fiction, I'm still learning how to do it well.