I got a bone to pick with you...

This afternoon, I was enjoying my lunch break at the local pie shop. I had bought a grape juice and candy bar from the grocery store, and was rounding off the meal with a tasty chili steak pie. Then, a woman walked in to the pie shop, and approached the counter to place an order. While she was standing at the counter, she turned around and placed a picked-clean bone on my table...and smiled at me. As if leaving the remains of your lunch on a stranger's table was the most perfectly normal thing in the world. And I thought, "Sure, I guess that's fine...I mean, I'm not going to move it, so go ahead." TIA.