I told MacCool to sit at the bottom of the stairs, which he obliged. Then I told him to stay. He obliged for a minute. As soon as I was out of sight, he climbed the stairs cautiously. I caught him with his guilty face on as he was halfway up the stairs and immediately his tail began wagging. The original video is grainy but clear enough to see the guilty face. I am not sure blogger's compressed version is going to be as good, but the wagging tail behind the guilty face should still be clear.