Late to the party here.
Sleeping one night on the couch as my wife had gotten mad at me for doing something stupid (don't remember what, but I bet that she does!) Around 2AM, I hear sounds from my piano in the other room. Not any particular piece of music, but just random keys being played over and over. I'm scared shitless and hoping my wife hears this so she can come downstairs and check it out, unfortunately no such luck. Shitty music keeps coming from the piano and I'm frozen, too scared to check it out. After about a minute I gather enough courage to go there and find my Labrador Retriever was attempting to get to the donuts that I had accidentally left on top of the piano and was banging on the piano keys while trying to get at them.