Why did he have to choose this moment to be nice to her?

The idea of choosing this moment is not by chance.

I have chosen this moment to say a few words.

The most important thing, Captain, is to choose your moment well.

Why choose this moment to begin a tail on him?

"You wouldn't be thinking that if my dad chose this moment to walk in."

The beast always chose this moment to walk the earth.

But that was exactly why they had chosen this moment to grill him.

While the guests are here in a controlled environment he can watch them and choose his moment.

So she expects to be able to choose her moment of retirement.