best animation of display of chakra would probably be naruto after sasgay's death

but i think the most awesome scene would still be rock lee opening the gates, his voice + the power + the music sent major chills down my spine =p
i'm not suprised that even gaara looked like he was going to shit himself

but that one is a bit too short though =p after that you dont see too much of the chakra anymore (probably cause he's moving too fast ^^)
it's still displayed the most when naruto first loses control