Videos shared on YouTube show the balloon colliding with spectators and tents while dragging two vehicles -- a pickup truck and a sport-utility vehicle -- attached to it for weight during intended tethered flights.
At least one of the vehicles collided with a vendor's tent while being dragged by the balloon, while witnesses said the other broke free from the tether.
Jenifer Sustachek, 46, of Waterford, suffered minor injuries during the incident.
"Look horrible but wanted to get the word out that ballooning is SAFE!! This was a freak accident and it was the skill of pilots and crew that prevented this from being much worse," Sustachek said in a Facebook post.