Not an altercation, but we witnessed a crazy scene when I was camping with my family as a kid.
We were camping in our popup and there were some tent campers on the site next to us. They were using kerosene to get their fire going and one of the females in the group caught herself on fire. She was screaming and running around and finally fell to the ground and and the guys helped smother the fire. She was burned pretty bad and had to be taken to a hospital.
I thought of this story last fall when I was using gasoline to help start a fire. ;)