Indoor free-fall kickstart at iFLY Paris, Porte de la Villette. A cylindrical wind tunnel sends a vertical “wind” at 200 km/h to compensate for gravity. To float or “fly”, you need to remain relaxed and zen-like, lying on the air mattress with your arms relaxed at the front, your head slightly upright, your legs normally apart and your toes stretched backwards... one minute for eternity, sensations guaranteed.

https://blogs.futura-sciences.com/bardintzeff/2020/02/21/ifly-ca-decoiffe/