I didn't know what people meant exactly when they said 'seeing stars' after a hard hit. In cartoons it's usually depicted as a solar system of stars orbiting the coyote's head after a particularly hard knock. Fairly recently, I've began seeing stars. But it's not because I picked up Thai kickboxing over my lunch breaks. Sometimes I'll see a constellation of shooting stars around the corners of my vision when I have a particularly vicious sneeze. I would probably see the entire universe if I ever got punched.