Strange Altercation at the Vegas Show

I was at the Vegas show at Planet Hollywood and it was my first time seeing Gizz. It was hands down the best concert of my life, but I had a strange altercation/interaction with the woman sitting behind me. Before the show started she was acting weird and disruptive. She kept kicking my chair and she got up to go to the bathroom 3 or 4 times, and without fail she would bump into my head every time she returned to her seat. She was also talking loudly and it didn't seem like she cared about the show at all, she was there with her friend or partner and they just seemed like they were in their own little world. About halfway through the show, I noticed she was lighting a cigarette or joint right behind my head and it smelled like absolute shit. I decided to turn around and give her an angry/questioning look. Without HESITATION, she yelled "What are you looking at, you white bitch?!" She then launched into an expletive filled rant, during which the only insult she could come up with was that I was white and also a bitch. I decided to just ignore her because I didn't want to escalate anything, and didn't want to upset my fiancee who I was with. Eventually, this woman got so angry and worked herself into such a rage that she left her seat and yelled "BE RIGHT BITCH!" She never came back to her seat and I never saw her again. There's no moral to the story, it was just very confusing.