Screenwriting

I need to come up with a topic for a new screenplay. I'm in Intermediate Screenwriting this coming semester. I was in Beginning Screenwriting last semester and I really didn't enjoy it, but I feel like I can't shut off that possible avenue for work in the future-- God knows there are going to be few enough as it is --so I'm suffering through the next class. But I need to have an idea for another screenplay soon, and I have no idea what to write about. And not only am I not crazy about the class, it's in a lousy timeslot, 4:30-7:30PM. I hate late classes.