When I was in high school I took a creative writing class, and we did the same thing, We had writing prompts. I always came up with some totally off the wall stories for my assignments. We were assigned a picnic scene, I wrote about ants. We were to write about a dark room. I wrote a ghost story with a twist. I couldn't write a normal story. My teacher loved them.
So, fast forward to my wonderful writing group. We had a writing prompt for an assignment. We were to post a picture and each member of the group was to choose one, write 500 words, and send it out for critique. We would meet Saturday and discuss our work. This was my picture.