Inspired by a question on Blender Underground. I made a simple plane and applied my stick figure to it as a texture with transparency. Then I added a track to contraint to make it follow the camera. Then I added a Limit Rotation constraint to keep it upright and animated the camera moving around the scene.
The little fella never takes his eye off the camera so you never see him from the side and notice how flat he is. Sadly, that’s given away by his shadow! lol