I noticed that; Sin caused some pretty serious damage during that attack but it goes largely unnoticed. Odd.
During the FMV, time seems to stop for a moment before all the displaced matter comes crashing back into the holes left behind by Sin's gravity pulses. The result is a massive plume of fire along the entire length of the holes, a wall of destruction that extends to the boundaries of space. I'm guessing that this destruction left a fairly smooth, albeit scorched, trail behind it once the dust settled.