大切なことを言うときは、この出だしで(6ページ目)

the thing is はこう使う

会話例の続きを見てみましょう。

So, here it comes.		What did you say?.
Are you nervous?		No, no, I'm all right.
But you look pale.		Well.... The thing is I hate the noise.
Yes, this noise! Heeeeeelp!.		Don't move!
But the noise! Stop it!		Okay, I can stop it. But here's the thing. Why are you here?

thing がもついろいろな意味について、一度辞書で調べておくことをおすすめします。