Why are they even letting these idiots in the store?

This afternoon I was walking across the street to the mall from the parking lot by the bus stop. It was raining hard and I was in flats so I had to leap across the stream of rainwater that had formed next to the street (thanks to lack of storm drains) to get across. 

A woman noticed me leaping and said, "Good job, you made it," and I was confused because I thought she was congratulating me for getting across the street, which is rather babyish because it's something that you would only say to a toddler who had managed to look both ways without a parent reminding them first. 

And then I looked at her and I was like, "So...?" 

We were walking at the same speed, and we both were separated for a brief second behind a vehicle. But then when she emerged again, we both happened to be headed for the door, and she said, "You know, I was only complimenting you." In a rather mean tone. 

And I was like, "Sorry, I thought you were--"

And as I was about to go through the door, she turned around and shot me a look, blocking my way. 

And then she said, "If you thought I was going to hold open the door for you, then absolutely not. You are rather nasty." 

I was like, "Alright, I'm sorry, it was a misunderstanding. I only thought you were saying--" But then she cut me off with a scowl and a short, "Harrumph!" 

I backed away and went to the library quickly. 

Afterwards, I looked around the mall to see if she was still there and if I could explain the misunderstanding to her without conflict, but then I didn't remember her appearance and she wasn't there anyways. I checked the bakery section to see if she was sitting at a table, but none of the patrons looked like her. I just gave up because I hate dealing with these kind of people. 

I spent the whole day thinking about it. 

Because she totally overreacted. Right? It was a misunderstanding, and then she called me "nasty." Even though I did nothing wrong. My parents would say I was being "rude," but I wasn't. They don't know me as well as I know me.