<human>: Summarize the given text in a few sentences.

So TIFU real bad.
I work as a makeup artist at one of the largest cosmetic companies in the world. I was with a client helping her pick out a brush, when all of a sudden this lady and her husband start SCREAMING at each other. So, naturally both myself and the client I'm helping look over at this insane, screaming couple. Just a quick glance, and we were done. 
I went back to showing her the brushes, when all of a sudden the screaming husband leaves the store. The screaming lady wanders over to the brush area. She looks as though she's calmed down, so I smile and say hello. She immediately says "YEAH I SAW YOU LOOKING. You must think it's REAL FUNNY, HUH?!"
I look over my shoulder, assuming she's yelling at her husband again or something. 
"IM TALKING TO YOU, STUPID"
Wow, okay. I flip into nice-bitch retail worker mode. "Is there something I can help you find, ma'am?"
"YEAH HOW ABOUT SOME FOOD AND A HOUSE? Can you HELP ME FIND THAT?!?"
"I'm sorry, ma'am. I wish I could help, but we only have makeup, skincare, and fragrance here."
"HOW THE FUCK IS THAT SUPPOSED TO HELP ME?" She screamed. "GO FUCK YOURSELF"
At this point, I'm done. I turn away and call on my radio for someone to call security. My manager asks her to stop verbally harassing me and leave the store. She refused, until mall security showed up. Then they made her leave.
My client I was helping (who just so happened to be a psychologist) said she was a text book schizophrenic. 

If you've never worked in retail, this is basically what it's like everyday, just a little more extreme.
<bot>: some crazy lady came into my store and asked me for food and shelter. I told her we only sell makeup and she told me to go fuck myself. Then security kicked her out.