Video captured the horrifying moment a hot air balloon carrying 21 passengers in Brazil caught fire and plummeted to Earth, killing eight of them and injuring the other 13

Colorful hot air balloons drifted into the skyline as kids did cartwheels on the grass, parents lounged in lawn chairs, and teenagers snapped photos in front of the towering balloons.

What goes into planning this colorful, carefully choreographed spectacle, and what can you expect to see? Here’s everything you need to know.