Dark Knight Rises forgot it was supposed to be realistic and just said "Fuck it, all it takes is the desire and you can get out of bed with a broken back and busted knee".
No. Fucking. Way. At least not the way it was shown in the movie.
Uhm. Batman has a flying vehicle that is aerodynamically impossible and Bane stole a FUSION REACTOR the size of a small car and you're complaining about Bruce Wayne's bum knee and "broken" back.
I'm not a scientist and know nothing about aerodynamics or fusion reactors, but I know very well what a broken back and a busted knee is. That is what makes the difference in the amount of suspension of disbelief.