The reason is usually to emphasize the words in the beginning and/or the end. This grammatical rule called inversion is often used in songs and even in general conversation. Here are some simple examples. あなたのことを思っています、わたし（はいつも）。 (In the regular order, わたしは(いつも)あなたのことを思っています: I'm (always) thinking about you ） (But the nuance would be like "The one who is thinking about you is……..Me. (Always)". -> This would be more like a song :D) さみしい、わたし。あなたがいなくて。　 （In the regular order, わたしはあなたがいなくてさみしい（です）: I feel lonely because you are not here.) つめたい、これ。(これはつめたい(です)) This is cold. 聞きましたか、そのこと？（そのことを聞きましたか？） Did you hear about that? Hope it helps.