Magic has just unfurled before your eyes, real, tangible, and impossible. Describe how you would react. Here's a very short excerpt from my current work: "Melina made it three quarters of the way in before she looked up and froze. Her breath caught in her throat, making a noise like a hiccup, and it felt like her heart skipped a beat." Feel free to be as descriptive as you like. Original entries and existing works are both welcome.