evidence: One can observe what looks something like a rat moving around the side of the second-stage rocket nozzle. [...] Under the acceleration of the rocket, the path along the narrowing crescent, in the direction the "rat" moves, is slightly "downhill". An object caught there would bounce around slightly with the vibration of the engine, and at some point could start migrating down along the arc of the manifold. Incidentally, in the absence of much, much more evidence, suggestions that this is a live rat on a filming set at low altitude, and that SpaceX's launch videos are faked, are not credible to me. Commercial, profit-driven corporations appear to give SpaceX a great deal of money to put expensive things into orbit. If you want me to believe that's not what's going on, the explanation needs to be simpler than my bouncing debris hypothesis.