As I have noted in prior posts, Middle Son is very interested in the trash, and making sure it gets taken out. Tonight, I watched him walk into the kitchen, take the trash can out, and up-end over the sink. He shook it to make sure he got everything out.
I was perplexed. This is a new wrinkle Middle's behavior. I had him come back in the kitchen and put the trash back into the can. My best guess as to what happened is that Middle wanted to take the trash out, but the door was locked so he couldn't. Dumping it into the sink the was the next best option.
UPDATE: The front door was not locked, so that explanation doesn't hold up. I have no idea what motivated this particular action.