Maybe Hinata's fall was meant for another meaning. Not necessarily one of logic because Hinata seemed absolutely determined in the Pain Arc to have Naruto live, even if she got KOed by Pain in the process. That's what's most shocking about Hinata giving up on Naruto's life that easily. Maybe his slowing heart got to her more, but either way it definitely proved Sakura's more determined than her (we already knew that though lol)
Personally, I feel like Hinata's prayer Neji was supposed to ramp up the suspense and prove that Naruto's really dying. I've had that impression ever since I first read it, it wasn't meant to prove Hinata's weak or something. At least I don't think that was Kishi's intention. I also think Kishi might've been trying to prove Sakura's the one that's truly close to him, but that's more of my shipper side.
Agree with the point you're trying to make. Maybe her fall symbolised that in the end how much ever she ran, she could never get close to Naruto upto a level Sakura is. It was nothing like she's weak or something but she 'just' stumbled and could see the cloud going farther and realised that how much ever she tried she couldn't reach Naruto now and hence gave up ending or reducing the chances of NH to almost 1%(1% incase of asspulls) and paved the way for NS development. But at the end of the day what matters(from shippers point of view) is that she could not reach Naruto but Sakura did.
Edited by narusaku256, 22 March 2014 - 11:02 AM.