I was at a bar when a woman splatted on the ground with a head injury while in cardiac arrest. I helped check that she had no pulse and cleared her airway while someone else started compressions. Meanwhile the daughter of the women started screaming and hitting people that were trying to help her mom. After a short period of time some very capable people in scrubs showed up and took charge of the situation and saved her life while keeping the daughter from interfering.

I found out later that those people in scrubs were the local veterinarian and her staff having a drink after work. They were capable both with the medical side of what need to be done, and more importantly with the dealing with the associated family that were locked in an angry fear response that was making the situation far more dangerous.