The gliding bird with skull 顔, a friend of Jacob's from the Temple of Death, flaps in the light under the direction of a tiny twin head set peacefully in middle of its back. You might think these two are watching, waiting for upcoming action, but it might also be true that they are different manifestations of Jacob; older versions of himself visiting the scene, trying to pick up pointers, maybe even say hello, if they can figure out a way to do that anonymously.