Here's a phenological mystery for you all...

I know this isn't a lovely picture, but that's not the point. The point is that I took it this morning. And it's a crabapple. Which flowered in the spring, and fruited, and is still bearing its fruit. And now, a few of its limbs have decided to flower again, for some reason unknown to me. I don't know what's going on, and Google didn't help me figure it out... see? A mystery.