re: Ice
Ice goes from left to right, then comes back into view from the side it just disappeared on, pulling a U-turn and whipping off into atmosphere.
I'm not sure at all it's the same piece of ice ; the last one, where we see a change of direction, can be explained by the numerous jet firings from the Shuttle's RCSs. It's like the solar panel moving in all directions that Thornton released during STS 61.