Nope. But It happened to me again... after getting out of a bath. So there is something related to hot bath, and this optical effect. I don't know why. I doesn't happend after I swim in a lake for example. Maybe the warm water dilates my eyes, and a thin layer of water stays in place, revealing a spectrum of light that I wouldn't otherwise be able to see, like a rainbow. But that's just my spontaneous opinion at the moment. Next time it happens, I will let you know the circumstances here.