Propeller Toad
Dislikes the amount of neglect Toad receives...
Oh yes, I remember that piano as well. It was pretty freaky as you definitely weren't expecting a piano to suddenly start chasing you and having a hunger for plumbers.
If there was one game out there to reintroduce this piano, it should have been Luigi's Mansion. Imagine just walking into a room and the door locks behind you (like a Zelda game scenario). Then all you see is a piano right at the center flashing its evil grin.The Mad Piano should have been a boss in Luigis Mansion. Or the piano that Melody played suddenly turned into a Mad Piano after you defeat her.