How to use "ends" in a sentence

The video ends with three simple words: 'I love you.'

"Yes," a voice replies, "and this is where it ends." And a tall man steps from behind one of the silent giants.

The headmaster is a man about the same age as Smith, but there the comparison ends

The model planes began to bounce violently up and down on the ends of their lines.

The ends of the curve slowly moved apart, until at least they formed a line about twelve kilometres long.

My narrative ends here, at the end of the happiest period in my life.