Checkout line at Sprouts. I stood on the green social distancing circle while the woman ahead of me, white, 60s, put her things on the conveyor belt. She turned to me, scowled, and swept her hand down dramatically, pointing at my feet. I looked down: yes, I was on the green. The problem was that she was not standing on hers. I said nothing. The clerk finished ringing her up, and she moved forward to the credit card station, so I moved up to the next circle. Again she gesticulated at my feet, this time adding, "Stand back!" "But the...