This story is short, sweet and mysterious: someone put a piano out on the frozen surface of Lake Monona. No one really knows the whos whats or whys, but there is a video of a man playing out on the ice. Presumably, he put it there, played for a bit and left. Due to the lakes being unstable right now, the Madison Police Department had to remove it.
So if you're missing a piano that you put out on Lake Monona, MPD is keeping it warm for you!