wren walks backwards

Wren has been walking backwards sometimes! The first time was last week while Jen and Xavier and I were playing in Wren's room and he was opening and closing his door. He looked at us and laughed and started backing out of the room. He had a cute look on his face like he realized he was doing something cool and he kept doing it. Since then, he's done it a few more times when he goes up to something then wants to go back the other way. I think he's been practicing this skill without knowing it while he closes doors, holding on to the handle.