I was trying to hang a picture over my desk. Muffin was walking by with a crayon, which she usually uses to color very nicely on a piece of paper, and I asked her if I could borrow it. She handed it over, and I made a tiny mark on the wall where the nail should go, and handed it back to her. It was all very cordial and I was impressed with how well we were communicating.
I grabbed a nail and got to hammering, so I could only partially make out what happened when Bug decided to apply the lesson she'd just learned for Dad and Damn Wifus started screaming. Here she is in OH CRAP YOU CANT PROVE ANYTHING mode.