What are your recurrent nightmares about?

I have recurrent nightmares in which I’m back in college, ready to graduate, except I’ve forgotten to go to my math class all semester, meaning I will fail. It’s almost always math (though occasionally it’s history or Spanish), and I always wake up in a cold sweat. I did graduate from college (and now I’m a professor), but apparently math (and history and Spanish) forever scarred me. How about you?