When I lived in the next town from where I am now, they had a similar event. I remember dogs in the neighborhood barking like mad and than deep whooshing sound the balloons made. Some flew right over our house and people in them waved to us.
I recall one weekday at work, a balloon was coming into our office building's large lawn very low. It was apparent it was crashing. We could see a car rushing to it from behind. The balloon landed, not really crashing but a hard landing, the basket tipped over and some people fell out. The people in the car rushed to assist.
We could tell the people were OK by the way they all got up and were walking around.