I think he thought he was hidden.
I bet he did think he was hidden
Not quite the briar patch.
Reminded me a story of O.D. she could stalk/ninja. She would do it to Molly and I could see the look in Molly's eye - uhmmm I can see you O.D. no matter how slow you move. I have seen lots of videos of Dobermans doing similar but not quite like O.D.