The coolest thing about the armor is that it's 100% real. It's an amazing piece of engineering and craftsmanship. I saw some video taken by some guy of the crew between shots, and Downey Jr. was able to walk around in the stuff, lie down on the ground and get back up with some assistance. Pretty much free range of motion. When you compare it to what the 501st guys go through just trying to move around, it's really impressive.