Quote Originally Posted by Crash
Naruto uses Oodama and gets a little winded. Dispelling the clones after training drains him completely to empty, to the point he passes out cold.
Sorry that's incorrect.

The reason why naruto passes out is not because of physical but mental exhaustion, having all that information pushed into his head ( see here ) and after using the oodama rasengan he seems to get a little beyond winded, more like so tired he can't even run anymore and using that much chakra may very well pull the kyuubi out.