Locked The Door To Obnoxiousness

(I am an independently contracted window artist. On this occasion, I am painting the glass double doors at the entrance of a restaurant. When customers approach the double doors, I usually open one for them, because otherwise, they tend to stand there confusedly, despite the full functionality of the door I’m NOT working on. This time, however, I’m standing on a chair and concentrating hard, so when a middle-aged woman approaches the entrance, I just smile and gesture to the other door. She clears her throat rather loudly and pointedly.)

Me: “You can go ahead through this other door, ma’am.”

(I return to my work. After I moment, I realize she hasn’t moved. I look back and find her GLARING at me.)

Customer: “Well?”

Me: “Ma’am?”

Customer: “Aren’t you going to open this door for me? Are you new or something? Your customers are more important than your silly drawings.”

(I had almost been ready to get down from my chair and open the door for her, but after this, I’m less willing.)

Me: “Ma’am, I’m not an employee. I just come here to do the art. As I said, you are welcome to go in through this door here.”

Customer: “That’s no excuse! They’re paying you, aren’t they? That makes you an employee!”

Me: “Ma’am, it is not in my job description to open doors for customers, especially when I am standing on a wobbly chair.”

(The woman huffed loudly and yanked open the door I AM WORKING ON, slamming it into my chair and causing me, in my flail for balance, to drag my hand through my fresh paint and ruin my work. I told the manager what happened, and she showed me how to lock the doors individually so I could lock the one I am working on. When the woman approached the door to leave, she deliberately tried to shove my door open again. Instead, she just slammed HERSELF hard against the locked door. She then opened the other door and rushed out without looking at me. It sounded like that door hurt!)