<human>: Wanted to post here to hear your stories.

This happened today:

On the 6 train today going into the city, some girl gets on board and takes up two seats from across me near the sliding doors. She's SKINNY, dressed to impress and has her earphones set on blast.

An elderly couple get on board with the man having a cane and walking in a baby-steps motion. Since her big ass Fendi bag doesn't need a whole fucking seat to itself, the elderly woman gently waves at the girl to ask if she could scoot over so her husband can sit near the edge (better to grab on to the bars when he needs to get back up). I SHIT YOU NOT this bitch looks up, takes out her earphones, HUFFS and says "No". 

This mothafucka. Me and like 4 other people get out of our seats to offer them instead, they end up taking mine because I have a seat to the edge and the person who sat next to me gave up her seat as well, a little girl who was seated nearby told her dad 'she should've said yes'. 5 or 6 stops roll by and the elderly couple got off, thanking me and the other woman profusely for being so kind. Same woman and I are able to get back the same seats since other people standing up motion for us to take them back. Everyone is staring daggers at the stuck up bitch. Not seeming to care, she goes on fiddling on her iPhone when not even 2 stops later she gets up to exit. 

I noticed she's wearing really cute black bumps, must've been 5 inch heels too. When she was about to get off, one of those perfectly shiny 5 inch heels went straight in between the train and platform making for a spectacular descent to the filthy, gum infested floor. The audience enjoyed a nice, loud smack effect as well. That didn't even top it off, what did it was that same little girl saying to her dad and rather loudly, "I wish she hit the floor harder." 

Nobody got up to help her. I looked at the little girl, nodded in approval and tuned my iPod to this [song] Today is a good day.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Girl does not give up extra seat for an elderly man to sit down, ends up falling on her face on the way out.