Don't you also get an S-like path if the missile is ballistic, then briefly twitches its fins to adjust to the target, then the fins revert to neutral?If you keeps the same straight line trajectories after the impact the apparent missile trajectory curves back up like an U, not like an S :
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You do get an S-curve if the missile "bounces" on the UAP, i.e. it is reflected in a straight line toward the camera :
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I'll try to set up a "missile still aiming for the laser pointer that is now pointing at the sea" scenario during the weekend.