Was the guy around 57 years old?
I actually saw the same exact type of fight in my local grocery store, and i DON'T live in a great neighborhood. It was between two guys. One with his young daughter that did not move out of the way of the guy crossing the aisle. They almost started swinging at each other. It was very loud and funny.
I was right behind them and I had to go through them as well. Omg I was so nervous. The girl was in the way again! wtf? I said "Excuse me" but she didn't move. UMMM, WTF?! Are you serious? Your father JUST had a fight with another guy for you doing this, and you're doing it again?
She was leaning on the cart, sideways with her butt sticking out blocking the aisle. "Excuse me" I said it again... Nothing... So I just went through, very slowly. By this time, the father was still yelling at the other guy, but he looked down at us while I was passing through. Yes, I covered my crotch area.