What gets me...
...Is that "hero" movies commonly and completely ignore the mass/momentum aspects of existing in a physical reality. Iron Man gets thrown violently to earth, hard enough to blow himself a new crater in the ground, but survives unscathed inside his suit.
Right.
He'd be a suit full of bloody scraps, is what he'd be. I know this is a movie, but why credit the techy aspects of it any more than the physics?
Note that a "hero" who had invented a gravity generator, would be but a tech tweak from casting it as an inertial dampener, if he could control it fast enough to be able to counter the force of impact with an equally powerful anti-force, for the split second it was required.
Risky, for control mishaps, but workable as a concept.
But since Tony Stark's only invention was the spin-dizzy, he should have been squashed like a bug.