Mirror mirror on the wall

Yesterday was my day off and I went with Marley to the forest in Purmerend. He also met his twin brother! It really looked like they were looking in the mirror... Great dogs they are.
My intention was to make a *panning picture of Marley because of a photochallenge I'm participating in, but that didn't quite work out hahaha.

*Panning: photo where the subject seems to stand still and the environment moves.

Do any of you still have an original idea? I can't get much further than a bike or car...