Waiting In Line

The other day I was waiting in line at the quick check-out counter at our local grocery store. Many of you have been there, where only fifteen items or less are accepted. Ahead of me were a couple of physically challenged customers. One, a woman in a wheel chair and the other, a male who was also  physically challenged. ​ He appeared to have MS. They had more than fifteen items and because of their challenges they were slow and the woman's wheel chair wouldn't fit into a regular check-out counter. Behind me was an impatient woman, who complained out loud, "You're only allowed fifteen items. I'[m in a hurry." She said this several times. How would you deal with the women behind you?