Believe it or not, indoor skydiving has its own international competition. Indoor skydiving facilities have gained in popularity over the last 20 years, with the official count now standing at over 200 wind tunnels worldwide. Credit: FAI / WISCThe World Indoor Skydiving Championships consists of two variants: Indoor Formation Skydiving and Artistic Events. Per the FAI:Formation and Vertical Formation Skydiving team members must execute a formation properly before moving onto the next formation. It’s quick work—hold, hold, hold, hold, in rapid succession.