TL:DR: Almost called police because mega-bitch decided to aerate a pumpkin bread, at a barista (you know, just some casual assault)

I almost called the police today. A woman ordered a banana bread, and got a pumpkin bread by accident. I (the ssv) personally told her over the headset we would give her a replacement for free for her trouble. I was not however the person at dt, another barista was. I wasn't at the window to hear the miscommunication, but apparently she also wanted a refund. The barista at the window I guess didn't know or hear that initially. When the barista handed her the new banana nut bread and apologized she yelled at him for a refund angrily. (This is when I noticed and headed towards the window to intervene) By the time I had neared the window she had gotten mad enough to throw the erroneous pumpkin bread at the barista doing dt as he turned to give her the refund. When I intervened she asked for the store manager's card, and when I came back from getting her refund as well as the SM and DM business cards I gave them to her after explaining that what she did was assault and that she needed to leave immediately. I tried to diffuse the situation, but im not sure I should have because of the, you know, **ASSAULT**. All over a piece of food that (at my store at least) only costs $3.41.