During the Balloon Launches look for those people on the ground, wearing yellow shirts, running around like they’re lost, looking all around them and up into the sky like someone’s after them, making weird hand signals to the Balloon Pilots and talking on radios.
They are a very important part of the launch process. They are the Pilot’s eyes, making sure the airspace above is clear for the launch and that no other balloons are going to launch and interfere with their launch. In short they are the Traffic Cops.
Watch for them as they often are as entertaining to see as are the balloons launching. Also, don’t hesitate to thank them for their work; after they’re done of course.