Solar flare sighed, spreading his wings out wide.
"It's these things. They reflect and refract light in sometimes unpredictable ways, and I've accidentally done everything from setting a building on fire to bleaching a pony's mane white. So, now I can only allow myself to fly when it's cloudy, or there isn't much of a moon, or I might hurt somepony." He said sadly, flapping powerfully again to compensate for his prior stillness.