It uses technology that actually isnt yet discovered ;D

i shall tell yiu the story of iron man. Tony stark was on an expesitio to sell his newest weapon, the jericho rocket. he was carched by some bad guys and they wanted he made a jerichorocket for them. he didnt do it and build teh iron man mark 1, to get out of there.a grenade sharf zas also tryig to get to his heart, and tge light circle us a mini arc reactor that stops the magnet that stops the grenade sharf.the arc reactor us also the pozer source of the iron man suit. so he was making it better, with the help of JARVIS, his computer. so, every armor became beter and got another name, like the first ia mark 1, the swcond mark 2. etc. you should really go watch iron man 3, its a really nice movie and comes to cinemas on mqy 3