A Dream of violence

I was in line at a grocery store with my friend Debbie when the woman in front of us took her hand out of her pocket and a candy bar wrapper fell out. It was on the belt, and Debbie picked it up and was going to throw it away when the woman got very upset. Debbie didn't understand why, but I explained to her that maybe it was a game piece and suggest she just give it back to the woman. Before she can, the woman lunges at Debbie and they fight for a little before she manages to escape. Later we are sitting on the 'husband benches' and see a woman we know. We start to explain what happened, but my alarm goes off.