There are times where the powerball gives out screeching/high pitch sound. Is that usual? I tried to record the sound but the sound aint comes out right.

Another sound would be some kind of rattling. I recorded it out. It doesnt sound like the powerball though, but what is important is the sound of the tak tak tak (very fastly done) and especially the last part you can hear the rattle... intermitantly and then lastly the ratatatatatatatatata...

Is this usual?

i upload the file to mediafire http://www.mediafire.com/?5dsz25txlcu