You guys know that you're not charging anything, right?
The bar is just an estimation of how much battery power you've got left before it dies out.
When you take all this load off of your iPod and put it on hold while just playing a song (opposed using the internet/playing a game), and the lit screen turns off, your estimated battery life has just increased, thus the bar fills up more, but only temporarily. Once you start to put your iPod to use again, the bar will slowly go back to how it's supposed to be.
You had to ruin the moment XD, anyway the bar will still go down step by step but when you do my trick it will go up in estimation which gave me more battery so, don't ruin tha moment .
it's called obvious glitches iPod/iTouch/iPhone makers missed out, they weill fix as soon as about 1000 people worldwide use it =/.
I don't know how much more clear I can make it...
It's not a glitch. You get NOTHING out of doing it. Your battery isn't magically charging up. The bar will go up, and go back down even faster once you start to use it again.