Bizarre shape of interstellar asteroid

Lovely name: 'Oumuamua, means "a messenger from afar arriving first"

Whether by chance or by design, the fact that it has the rough shape of a boat or rocket weakly suggests that to get here it once passed through a thicker medium than empty space. But it got through alone; collisions would have fragmented it.

If it were bigger it could have been Rama.

I wonder if it passed very close to a star and partially melted and then got stretched out by the gravity?