system
Given the following post, respond as if you're commenting on Reddit:
human
[IronMan 3] How does Tony Stark's new armor work?

Sorry for the vague question. What I want to know is how does Tony's armor become front loading, rear loading, even able to eject him and release only his leg? Its not nano-tech is it?

He enters his armor sometimes from the front, sometimes from the back... how does that work?
gpt
He gave each bit of the armour its own independent processor. Up to the Battle of New York he had to attach bracelets to his wrists in order for his armour to find him and suit him up. 

Realising that this was a problem Stark upgraded each piece of armour so that it could work independently of every other piece. That way, if he was ever falling off a building again getting at least enough to let him fly would save him from crashing, even if he didn't have the full suit.