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Kelenic turned the ball into a vapor trail, leaving his bat at 112 mph and traveling 455 feet into the stands in deep right-center.

The awesome spectacle and the long, lingering vapor trail brought people outside or to their windows to see what happened—and that’s when the shock wave touched down.

South Korean social media and internet sites were abuzz with messages by citizens who said they saw a soaring object, rainbow-colored vapor trail or other mysterious lights.

The track of his life is “a flicker and a dash, a vapor trail. Even in his letters he seems to have one foot out the door,” she writes.

There was no need to watch the baseball turn into a vapor trail.