Flying an A-10 requires a lot of gear: helmets, harnesses, anti-gravity suits, night vision goggles, targeting equipment, radios, personal flotation devices, parachutes, survival kits, tracking devices and more.

Source: https://www.dvidshub.net/news/447375/aircrew-flight-equipment-airman-serves-with-pride

He is walking on his own on an anti-gravity treadmill, which allows him to fully do the motion of walking, while easing the impact on his lower extremities.

Source: https://hollywoodlife.com/2023/03/27/jeremy-renner-walking-treadmill-snow-plow-accident-video/

“In my opinion, I’m not a physicist, that’s the anti-gravity energy.

Source: https://brobible.com/culture/article/tic-tac-ufo-filmed-fast-california/