It just looks like paint

The combination of blogging and taking the commuter train has sparked in me a new interest in sociology.  I never took a course in high school or college, because theater always met that cluster criteria, but every day working in the city I observe the oddest behavior with adults and starts my brain wondering.  Today:

A 60 year old business man dressed in a suit walking through the Union Station terminal bouncing a blue raquet ball as he walked.  My curiosity: could this be a stress reliever or a sensory thing?

But what had me pondering more was the interaction between a few women on the train.  I can't exactly figure out if they were being friendly to each other, or just vicious.  On the train, groups of people regularly hang around because they see each other daily at the station and sit together.  Here is what happened between two women:

Woman 1 loudly, as she boarded the train: "It looks like paint.  It just looks like paint."
Woman 2: {nothing} I couldn't figure out who was Woman 2 yet, but I started to look around wondering what looked like mis-placed paint, or a paint splat.
[train chugs on and approachs Union Station. People start to prematurely line up in the aisle to disembark]
Woman 1 to Woman 2, standing in the aisle, with 3 people in between Woman 1 & Woman 2.

Woman 1, through all the people in the aisle: "It looks just like paint.  I wouldn't worry, people won't think anything."
Woman 2: "Oh, yea, I have to figure out what to do." {looks back on her khacki pants at what looks like chocolate frosting} Ah ha!  I found out who Woman 2 is!

Woman 1: "Don't worry about it at all, maybe take your jacket & put it around your waste.  By the way how is your GERD doing?"
Woman 2, semi-quietly: "What?"
Woman 1, louder: "Your GERD!?"
Woman 2, semi-quietly, looking around at all of us now watching her: "Oh, it's okay, I'm eating things now, like tomatoes..." this is when I started to drown her out.

So, I'm curious: what was Woman 1's intention of calling Woman 2's bad morning out in front of 50 people on the commuter train?  Kind of mean, if you ask me.  Maybe at the most, only the person standing behind Woman 2 would notice she had something on her pants and she could have stumbled through the day unnoticed...but instead Woman 1 called her out in front of everyone.  I'm wondering if Woman 1 realized how mean she was being and how she was making this woman's morning even worse.

Good luck to that poor woman with the chocolate frosting on her derriere; may her walk through the city be a brisk one, with everyone behind her looking up.