Stalked by Rainbows

I sense a trend, here. On the second day of February, I posted a photo of a rainbow that surprised me in a hallway. On the second day of March, I wake to a rainbow on the bedroom ceiling...in a room where there is no glass crystal in a window to be casting that spectrum of colors. I take a picture, then go to solve the mystery. The answer? A simple CD has been upended onto the floor, during the night (most likely by a prowling cat) so that the disc's laser-grooved side reflects a rainbow upward. Me, stalked by rainbows? I'll take it. I've had worse problems.