was this a "Strafing Run" by ET's? You be the judge...I would rather use Occam's Razor by comparing this to what we have seen in recent history, that gives me one answer and that is asteroids/comets/other bits of space rock still floating around the sun that happen to get torn up and come down in a line like what we saw happening on Jupiter a few years ago with the Shoemaker-Levy comet demise...
My question would also be... Where are the remains of the "target"?
That would be the kicker...