What is the climax of the story "Little Things Are Big"?

It was late after midnight on the night before Memorial Day.

And here I was, hours past midnight, and the white lady with the baby in her arm, a suitcase and two white children badly needing someone to help her.

...if I am ever faced with an occasion like that again, I am going to offer my help regardless of how the offer is going to be received...

I pushed by her like I saw nothing as if I were insensitive to her needs. I was like a rude animal walking on two legs just moving on...