Hey Pandas, Have You Ever Been Disrespected By A Co-Worker And Was Able To Watch Karma Do Her Thing?

At work today I rang out the girl (I'll call Amy) who bought some snacks before her shift. She left her bag on my counter and I still had a line of people so I say "Hey Amy, here's your bag". She screams "NOT RIGHT NOW ELAINE!! I'LL GET IT IN A MINUTE!!" I put it on her counter. And stared at the back of her head. The manager came and pulled my register drawer and we went into the office. Five minutes later, tops, we hear two women arguing very loudly. Amy was having a shouting match with a customer who was in the store with her family. Two small kids. My face was GLUED to the office window with the two way glass. Amy was off the hook, in front of everyone in the store. In the end the issue was minor. The woman's daughter was turning 10 and wanted 10 particular Mylar balloons. They selected five already blown up and wanted five other to be blown up. The woman said she needed this done to Amy and Amy blew a gasket. In the end, I took care of the woman and her daughters balloons. I told a joke to change the mood. Did my job. We finished our transaction and while they headed to the door, I got my things together to leave as well. Before that could happen, Part 2 came out. The lady asked Amy for her name and Amy said "I don't have one." Again in front of everyone. I was dying inside. The lady made a comment and asked her again. This time Amy said for her to call corporate, they'll know. OMG. The show was over so I started out the door which was held open by the ladies husband. A few steps from the store I look at her and say "her name is Amy". In and out of the store she thanked me a few times, so I throw in there "tell them I was really great!" So, I witnessed three meltdowns in less than 15 minutes by the same person. I'll see how far her favoritism with the manager will fly.